• Temperature rating of -60C and -76F
• Seven-layer removable inner boot system provides excellent thermal resistance and vapor transfer for long-term performance and comfort
• Full-grain leather and Diamond-lite nylon uppers offer winterproof construction and serious durability
• Drawcord collar with cordlock and triple strap system offers full adjustment of fit for comfort and seals out cold air and moisture
• Raised Perflex footbeds insulate, trap moisture and provide cushioning underfoot
• Gelflex heels and midsoles absorb shock and cushion to relieve fatigue while insulating from the cold ground
• Synthetic rubber bottoms are waterproof, lightweight, flexible and durable
• Inner liner is removable
• Aggressive outsole pattern resists clogging while providing exceptional traction and long wear