Columbia Women's Loveland Mid Omni-Heat Snow Boot 100% Textile and Synthetic Imported Synthetic sole Shaft measures approximately 8" from arch Boot opening measures approximately 13.5" around Techlite lightweight midsole for long lasting comfort, superior cushioning, and high energy return. Omni-Grip non-marking traction rubber. Waterproof woven synthetic textile with faux-fur collar and tongue lining. Textile webbing. Omni-Tech waterproof breathable seam-sealed membrane bootie construction. 200g insulation. Rated -25F/-32C. Omni-Heat reflective lining.