Baffin Men's Icebear Safety Work Boot 100% Synthetic Rubber sole Shaft measures approximately Knee High" from arch Specifically designed for the North American Climate; Lightweight Abrasion Resistant Polyurethane (PU) Molded Boot Wide fit through the calf and foot; Thermal PU is cold/crack resistant to -50 Degrees Fahrenheit Acid and Oil Resistant Rubber Outsole; Multi-density removable comfort insole Metal -free Composite safety toe and plate; Gel-Flex PU midsole provides comfort and reduces fatigue CSA/ASTM/CE approved; ESR/EH rated