Columbia Women's Heavenly Omni-Heat Mid Calf Boot Man Made Imported Synthetic sole Shaft measures approximately mid-calf from arch Omni-Grip non-marking traction rubber Removable contoured PU footbed Waterproof woven synthetic textile. Textile webbing. Metal rivets and aglets. Faux-fur collar and tongue lining. Omni-Tech waterproof breathable seam-sealed membrane bootie construction. 200g insulation. Rated -25F/-32C. Omni-Heat reflective lining.