• 9.5" tall boots keep legs and feet protected down to -40F/-40C
• Removable foam liner with warm fleece lining and cuff
• Removable DuPont Thermolite 200-gram full-foot insulation
• Full-length internal EVA filler in soles for extra comfort
• Adjustable closure with nylon straps and curved pull tabs for easy adjustment and support
• Speed lacing system for maximum ease and adjustability
• Replacement boot liners sold separately
• Sizing tip: We suggest going up one size. So if you take a size 10, order a 11.