Pajar Men's Ignatius Snow Boot 100% Synthetic, Nylon, Suede Imported Synthetic sole Shaft measures approximately 6" from arch Boot opening measures approximately 9" around - Ankle Winter Boot. - Synthetic/Nylon/Suede Construction. - Removable Aluminum Thermal Insole. - Waterproof. - Verified Comfort Level to -30. - IceGripper soles.