Techlite lightweight midsole for long lasting comfort, superior cushioning, and high energy return Combination of leather, nylon, webbing and metal hardware. Techlite shell Waterproof seam-sealed construction Omni-heat reflective lining. 200g insulation. Rated -25F/-32c. Michelin winter compound Cold temperature firm grip to -30 degree/-22 degree. Anti-slip rubber, good abrasion resistance