Designed to protect feet in temperatures as low as -40 °F (-40 °C), Muck Arctic Sport High Performance Tall Steel Toe Insulated Men's Rubber Work Boots feature 5 mm neoprene that is 100% waterproof and shock-absorbent. The material retains heat and flexibility, adjusting to the natural contours of the feet for supportive comfort. Insulation consists of warm fleece linings and thermal foam to add protection between the soles of the feet and the boot's molded outsole. Rubber overlays on these insulated work boots rise above the ankle for excellent moisture protection when walking in deeper snow and slush. The steel toe in these men's work boots offers good protection against impacts and heavy falling objects.