{"product_id":"crispi-forst-kl3-gtx","title":"Forst KL3 GTX Chainsaw Boots","description":"\u003ch1\u003eCrispi Forst KL3 GTX Chainsaw Boots - Class 3 EN ISO 17249 - Gore-Tex Insulated\u003c\/h1\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eCrispi Forst KL3 GTX\u003c\/strong\u003e is a Class 3 chainsaw protective boot certified to \u003cstrong\u003eEN ISO 17249:2013 KL3\u003c\/strong\u003e — the highest chainsaw protection class available for footwear, covering chain speeds up to \u003cstrong\u003e24 m\/s\u003c\/strong\u003e. Weighing just \u003cstrong\u003e1,180g\u003c\/strong\u003e, the KL3 directly challenges the traditional trade-off in Class 3 chainsaw boots: the choice between maximum leg protection and practical daily wearing weight. A fully waterproof and insulated \u003cstrong\u003eGore-Tex Insulated Comfort\u003c\/strong\u003e membrane keeps feet dry and warm in cold and wet forestry conditions, while the \u003cstrong\u003eVibram Full Control sole with EFX midsole\u003c\/strong\u003e and semi-rigid dual-density PU construction delivers secure grip and precision underfoot on uneven terrain. The \u003cstrong\u003eall-round rubber protective rand\u003c\/strong\u003e, \u003cstrong\u003ealuminium toe cap\u003c\/strong\u003e and \u003cstrong\u003epuncture-resistant insole\u003c\/strong\u003e complete a protection profile designed for arborists and forestry professionals working in the most demanding environments. Available in anthracite in EU sizes 39 to 47 (approximately UK 6 to UK 12). In stock at Gustharts with free UK delivery available.\u003c\/p\u003e\n\n\u003cp\u003eCrispi is an Italian footwear manufacturer founded in 1975, producing premium hunting, tactical and outdoor performance boots. The Forst KL3 GTX is Crispi's first Class 3 chainsaw boot — applying their expertise in lightweight performance footwear engineering to the requirements of full KL3 protective certification, and distributed in the UK through Outwear.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEN ISO 17249:2013 KL3 certification\u003c\/strong\u003e — Class 3 chainsaw protection; covers chain speeds up to 24 m\/s; the highest available protection class for chainsaw footwear\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAll-round rubber protective rand\u003c\/strong\u003e — circumferential rubber toe and lower-foot protection absent from most Class 2 chainsaw boots\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAluminium toe cap\u003c\/strong\u003e — impact and compression protection; lighter than steel at equivalent protection rating\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePuncture-resistant insole\u003c\/strong\u003e — differentiated anti-perforation structure protects against ground-level penetration hazards\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e1,180g\u003c\/strong\u003e — lightweight for a full Class 3 certified chainsaw boot; significantly lighter than traditional heavy Class 3 alternatives\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGore-Tex Insulated Comfort Footwear\u003c\/strong\u003e — 100% waterproof membrane with insulation for warmth in cold and wet working conditions\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVibram Full Control sole with EFX midsole\u003c\/strong\u003e — designed for maximum grip and traction on varied terrain; precision underfoot feel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSemi-rigid PU midsole with dual density\u003c\/strong\u003e — combines underfoot protection with the support and responsiveness needed for precision work on the spikes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThermo-Wire\u003c\/strong\u003e — Crispi's structural support system built into the upper for enhanced stability, structure and ankle protection without added bulk\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInstant-Fit system\u003c\/strong\u003e — combines Board Lasting, Ankle Bone Support System and Anatomic Fit for day-one comfort without a break-in period\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWater repellent crust leather upper\u003c\/strong\u003e — durable outer layer with inherent water resistance\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRemovable CRISPI Antistatic footbed\u003c\/strong\u003e — supports hygiene and custom insole use\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAvailable EU 39–47\u003c\/strong\u003e — approximately UK 6 to UK 12\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical Specification\u003c\/h2\u003e\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse; text-align:left; border:1px solid #ddd;\"\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003cth style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eBrand\u003c\/th\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eCrispi (Italian manufacturer, founded 1975)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eModel\u003c\/th\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eForst KL3 GTX\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eChainsaw Protection Standard\u003c\/th\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eEN ISO 17249:2013 KL3 (also referenced under superseded standard EN 381-3)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eProtection Class\u003c\/th\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eClass 3 — chain speeds up to 24 m\/s\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eWeight\u003c\/th\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003e1,180g\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eColour\u003c\/th\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eAnthracite\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eSize Range\u003c\/th\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eEU 39–47 (approximately UK 6–12)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eUpper\u003c\/th\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eWater repellent crust leather\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eLining\u003c\/th\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eGore-Tex Insulated Comfort Footwear — waterproof and thermally insulated\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eToe Cap\u003c\/th\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eProtective aluminium\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eRand\u003c\/th\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eAll-round rubber protective rand\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eInsole\u003c\/th\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eDifferentiated structure anti-perforation\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eRemovable Footbed\u003c\/th\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eCRISPI Antistatic\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eSole\u003c\/th\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eVibram Full Control with EFX midsole\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eMidsole\u003c\/th\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eSemi-rigid PU, dual density\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eTechnologies\u003c\/th\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eThermo-Wire structural support; Instant-Fit (Board Lasting + Ankle Bone Support + Anatomic Fit)\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eUnderstanding EN ISO 17249 and the KL Classes\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eEN ISO 17249\u003c\/strong\u003e is the current European and international standard for chainsaw protective footwear. It supersedes the earlier standard \u003cstrong\u003eEN 381-3\u003c\/strong\u003e — you may see older boot listings referenced under EN 381-3, but the testing methodology and performance requirements are equivalent. The standard defines three protection classes based on the chain speed the boot must withstand in testing:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClass 1 (KL1)\u003c\/strong\u003e — protection against chain speeds up to 16 m\/s\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClass 2 (KL2)\u003c\/strong\u003e — protection against chain speeds up to 20 m\/s\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClass 3 (KL3)\u003c\/strong\u003e — protection against chain speeds up to 24 m\/s — the highest available class\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Forst KL3 GTX is certified to KL3 — the maximum level of chainsaw boot protection. In addition to the KL3 chainsaw rating, the certification code includes: \u003cstrong\u003eCI\u003c\/strong\u003e (cold insulated — the Gore-Tex Insulated membrane); \u003cstrong\u003eE\u003c\/strong\u003e (energy absorption of heel); \u003cstrong\u003eWR\u003c\/strong\u003e (water resistant to the sole); \u003cstrong\u003eWRU\u003c\/strong\u003e (water resistant upper).\u003c\/p\u003e\n\u003cp\u003eClass 3 certification is required by some employers and organisations for chainsaw operators in high-risk environments, and may be specified in some contracts. For arborists operating chainsaws at height, Class 3 provides all-round protection against the full range of contact angles that aerial work creates.\u003c\/p\u003e\n\n\u003ch2\u003eKL3 vs KL2 - Forst KL3 GTX vs Forst GTX\u003c\/h2\u003e\n\u003cp\u003eBoth are Crispi Forst chainsaw boots using Gore-Tex waterproofing and premium Vibram soles. The key differences determine which is right for your risk level and working environment.\u003c\/p\u003e\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse; text-align:left; border:1px solid #ddd;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eCrispi Forst GTX (KL2)\u003c\/th\u003e\n        \u003cth style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eCrispi Forst KL3 GTX (this product)\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eProtection class\u003c\/td\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eClass 2 — up to 20 m\/s\u003c\/td\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eClass 3 — up to 24 m\/s (highest available)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eCertification\u003c\/td\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eEN ISO 17249:2013 KL2\u003c\/td\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eEN ISO 17249:2013 KL3\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eWeight\u003c\/td\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003e930g\u003c\/td\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003e1,180g\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eRubber rand\u003c\/td\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eNo\u003c\/td\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eYes — all-round rubber protective rand\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eGore-Tex type\u003c\/td\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003ePerformance Comfort (non-insulated)\u003c\/td\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eInsulated Comfort (warm and waterproof)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eSole\u003c\/td\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eVibram MEGAGRIP\u003c\/td\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eVibram Full Control with EFX midsole\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eMidsole\u003c\/td\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003ePU shock absorbing\u003c\/td\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eSemi-rigid dual-density PU\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eBest for\u003c\/td\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eThree-season forestry and arboricultural use; employers specifying KL2 minimum\u003c\/td\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eMaximum protection environments; aerial work; winter\/cold-weather use; KL3 contract requirements\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003eChoose the \u003cstrong\u003eKL3\u003c\/strong\u003e if your employer or risk assessment specifies Class 3 protection, if you work with high-speed professional chainsaws, if you regularly work aerially where contact angle varies, or if you need insulated waterproofing for cold-weather working. Choose the \u003cstrong\u003eKL2\u003c\/strong\u003e if Class 2 satisfies your risk assessment and you prioritise the lightest possible boot. \u003ca href=\"\/ja\/products\/crispi-forst-gtx-chainsaw-boots\"\u003eSee the Crispi Forst GTX (KL2) here.\u003c\/a\u003e\u003c\/p\u003e\n\n\u003ch2\u003eAlso Known As\u003c\/h2\u003e\n\u003cp\u003eThe Crispi Forst KL3 GTX is also referred to as \u003cstrong\u003eClass 3 chainsaw boots\u003c\/strong\u003e, KL3 chainsaw boots, chainsaw protective footwear, forestry safety boots and chainsaw safety boots. In some contexts it may be referenced under the older EN 381-3 chainsaw boot standard — the EN ISO 17249:2013 standard this boot is certified to is the current equivalent. For ordering, reference the \u003cstrong\u003eCrispi Forst KL3 GTX\u003c\/strong\u003e and select your EU size from the range available.\u003c\/p\u003e\n\n\u003ch2\u003eComplete Your Kit\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003ca href=\"\/ja\/collections\/chainsaw-trousers\"\u003e\u003cstrong\u003eChainsaw protective trousers\u003c\/strong\u003e\u003c\/a\u003e — EN ISO 11393-2 certified leg protection required alongside certified chainsaw boots for full lower-body chainsaw PPE compliance\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/ja\/collections\/climbing-equipment\"\u003e\u003cstrong\u003eChainsaw helmet systems\u003c\/strong\u003e\u003c\/a\u003e — certified face, visor and hearing protection for the full chainsaw PPE ensemble\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/ja\/collections\/climbing-harness\"\u003e\u003cstrong\u003eClimbing harnesses\u003c\/strong\u003e\u003c\/a\u003e — required PPE for aerial chainsaw work where the KL3's all-round protection is most relevant\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eExplore More\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/ja\/collections\/climbing-harness\"\u003eClimbing Harnesses and PPE\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/ja\/collections\/chainsaw-trousers\"\u003eChainsaw Trousers\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/ja\/pages\/stihl-machinery\"\u003eSTIHL Chainsaws\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFAQs\u003c\/h2\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eWhat is the difference between Class 2 and Class 3 chainsaw boots?\u003c\/summary\u003e\n  \u003cp\u003eClass 2 (KL2) boots are certified to protect against chain speeds up to 20 m\/s. Class 3 (KL3) boots protect against chain speeds up to 24 m\/s and typically also include additional protective features such as an all-round rand. Class 3 is the highest chainsaw boot protection class available under EN ISO 17249.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eDo I need Class 3 chainsaw boots?\u003c\/summary\u003e\n  \u003cp\u003eThis depends on your employer's risk assessment, contract specifications and the type of chainsaw work you carry out. Class 3 is required by some employers and organisations, particularly for high-speed professional chainsaw use and aerial work. Consult your employer's PPE requirements and your risk assessment before selecting a protection class.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eIs EN ISO 17249 the same as EN 381-3?\u003c\/summary\u003e\n  \u003cp\u003eEN ISO 17249 is the current standard for chainsaw protective footwear. It supersedes EN 381-3. The protection classes and testing methodology are equivalent — a KL3 boot certified under EN ISO 17249 provides the same level of protection as a Class 3 boot certified under the older EN 381-3.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eAre these boots warm enough for winter forestry work?\u003c\/summary\u003e\n  \u003cp\u003eYes. The Gore-Tex Insulated Comfort Footwear lining provides both waterproofing and thermal insulation for cold-weather use — this is the insulated variant of Gore-Tex, unlike the non-insulated Performance Comfort lining in the Forst GTX KL2.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eWhat UK shoe sizes do EU 39–47 correspond to?\u003c\/summary\u003e\n  \u003cp\u003eApproximately: EU 39 ≈ UK 6, EU 40 ≈ UK 6.5, EU 41 ≈ UK 7.5, EU 42 ≈ UK 8, EU 43 ≈ UK 9, EU 44 ≈ UK 9.5–10, EU 45 ≈ UK 10.5–11, EU 46 ≈ UK 11–11.5, EU 47 ≈ UK 12. If you are between sizes, Crispi recommend sizing up due to the precision Instant-Fit construction.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eWhat is the Instant-Fit system?\u003c\/summary\u003e\n  \u003cp\u003eInstant-Fit is Crispi's proprietary fit system combining Board Lasting (a rigid insole board for structural foot support), Ankle Bone Support System (targeted padding around the ankle bones) and Anatomic Fit System (a last shaped to the natural foot form). Together they provide day-one comfort without the traditional break-in period.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eWhat is Thermo-Wire?\u003c\/summary\u003e\n  \u003cp\u003eThermo-Wire is a Crispi structural support element built into the upper of the boot. It provides additional rigidity, stability and ankle support without adding significant weight — a key part of how the KL3 achieves its Class 3 rating at 1,180g.\u003c\/p\u003e\n\u003c\/details\u003e","brand":"Crispi","offers":[{"title":"UK 5.5 \/ Personal Use (Zero-Rated VAT)","offer_id":58529471857014,"sku":"CY-WF3925-6600-39","price":300.0,"currency_code":"GBP","in_stock":true},{"title":"UK 5.5 \/ Business \/ Trade Use (VAT Applies)","offer_id":58529471889782,"sku":"CY-WF3925-6600-39","price":300.0,"currency_code":"GBP","in_stock":true},{"title":"UK 6.5 \/ Personal Use (Zero-Rated VAT)","offer_id":58529471922550,"sku":"CY-WF3925-6600-40","price":300.0,"currency_code":"GBP","in_stock":true},{"title":"UK 6.5 \/ Business \/ Trade Use (VAT Applies)","offer_id":58529471955318,"sku":"CY-WF3925-6600-40","price":300.0,"currency_code":"GBP","in_stock":true},{"title":"UK 7 \/ Personal Use (Zero-Rated VAT)","offer_id":58529471988086,"sku":"CY-WF3925-6600-41","price":300.0,"currency_code":"GBP","in_stock":true},{"title":"UK 7 \/ Business \/ Trade Use (VAT Applies)","offer_id":58529472020854,"sku":"CY-WF3925-6600-41","price":300.0,"currency_code":"GBP","in_stock":true},{"title":"UK 8 \/ Personal Use (Zero-Rated VAT)","offer_id":58529472053622,"sku":"CY-WF3925-6600-42","price":300.0,"currency_code":"GBP","in_stock":true},{"title":"UK 8 \/ Business \/ Trade Use (VAT Applies)","offer_id":58529472086390,"sku":"CY-WF3925-6600-42","price":300.0,"currency_code":"GBP","in_stock":true},{"title":"UK 9 \/ Personal Use (Zero-Rated VAT)","offer_id":58529472119158,"sku":"CY-WF3925-6600-43","price":300.0,"currency_code":"GBP","in_stock":true},{"title":"UK 9 \/ Business \/ Trade Use (VAT Applies)","offer_id":58529472151926,"sku":"CY-WF3925-6600-43","price":300.0,"currency_code":"GBP","in_stock":true},{"title":"UK 10 \/ Personal Use (Zero-Rated VAT)","offer_id":58529472184694,"sku":"CY-WF3925-6600-44","price":300.0,"currency_code":"GBP","in_stock":true},{"title":"UK 10 \/ Business \/ Trade Use (VAT Applies)","offer_id":58529472217462,"sku":"CY-WF3925-6600-44","price":300.0,"currency_code":"GBP","in_stock":true},{"title":"UK 10.5 \/ Personal Use (Zero-Rated VAT)","offer_id":58529472250230,"sku":"CY-WF3925-6600-45","price":300.0,"currency_code":"GBP","in_stock":true},{"title":"UK 10.5 \/ Business \/ Trade Use (VAT Applies)","offer_id":58529472282998,"sku":"CY-WF3925-6600-45","price":300.0,"currency_code":"GBP","in_stock":true},{"title":"UK 11.5 \/ Personal Use (Zero-Rated VAT)","offer_id":58529472315766,"sku":"CY-WF3925-6600-46","price":300.0,"currency_code":"GBP","in_stock":true},{"title":"UK 11.5 \/ Business \/ Trade Use (VAT Applies)","offer_id":58529472348534,"sku":"CY-WF3925-6600-46","price":300.0,"currency_code":"GBP","in_stock":true},{"title":"UK 12 \/ Personal Use (Zero-Rated VAT)","offer_id":58529472381302,"sku":"CY-WF3925-6600-47","price":300.0,"currency_code":"GBP","in_stock":true},{"title":"UK 12 \/ Business \/ Trade Use (VAT Applies)","offer_id":58529472414070,"sku":"CY-WF3925-6600-47","price":300.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0690\/6603\/1348\/files\/Crispi-Forst-KL3-GTX-Chainsaw-Boots.png?v=1787579938","url":"https:\/\/www.gustharts.com\/ja\/products\/crispi-forst-kl3-gtx","provider":"Gustharts","version":"1.0","type":"link"}