These boots are called Siberian for a reason. Ready to help you stay toasty, they're constructed with 600 grams of insulation that helps provide cold-weather comfort and heat retention. The OrthoLite O-Therm aerogel-infused footbed helps create a thermal barrier underfoot, helping to block cold and regulate temperature. They're certified to temperatures as low as -40°C/-40°F and feature oil and slip resistant all-weather TPU outsoles with deep lugs to help add traction for trekking through mud and snow. There's a breathable and moisture-wicking flannel lining, non-metallic shank help with structural support, and cement construction that helps deliver flexibility and durability and flexibility. 

• Asymmetrical composite safety toe
• Non-metallic puncture resistant plate
• 24/7+ Comfort Platform for springy, breathable & lightweight comfort
• OrthoLite O-Therm aerogel-infused footbed that creates a thermal barrier underfoot which blocks cold & maintains footwear temperature regulation
• Lightweight Hover Spring foam midsole provides industry leading underfoot comfort, flexibility, and durability
• Oil and slip resistant All-weather TPU outsole with deep lugs for mud and snow traction
• Premium full-grain waterproof leather with waterproof membrane
• 600 grams of insulation for cold-weather comfort and heat retention
• Certified to -40°C/-40°F
• ExoSpine technology to provide lasting structure, durability, and improved heel fit
• Crampon and microspike compatible TPU shell
• Breathable and moisture-wicking flannel lining
• Non-metallic shank for structure support
• Cement construction for flexibility and durability and flexibility

Safety Features

• Composite safety toe meets US and Canadian safety standards including ASTM F2413 impact (I) and compression (C) requirements when tested to ASTM F2412, and CSA Z195 grade 1 toe protection.
• CSA Green Triangle and ESR meets CSA-Z195-14 safety standards to provide toe protection, puncture resistance and resistance to electric shock in the sole.
  
• Protective Sole Plate (Non-Metallic Plate) meets US and Canadian safety standards including ASTM F2413 and F2892 puncture resistance requirements when tested to F2412, and CSA Z195 protective sole.
• Waterproof membrane delivers waterproof protection, and also provides blood-borne pathogen resistance as defined by ASTM F1671.
• Electric Hazard Protection provides secondary underfoot protection against live electrical circuits, electricity energized conductors, parts or apparatus less than 600 volts. Meets the ASTM standards F2413 and F2892 requirements when tested to F2412.
  
• Electric Shock Resistant sole meets the CSA Z195 electric shock resistant requirements, as well as ASTM standards F2413 or F2892 electric hazard protection when tested to F2412.
• Slip-Resistant (SR) meets the SR requirements of ASTM F2413, F2892, or F3445, when tested to F2913.