Ranger 10" Men's Leather & Rubber Double-Insulated Steel Toe Pac Boots, Black (A422) Durable and rugged leather upper protects you from the elements; waterproof rubber bottom; combines the fit, feel and lace-up security of leather boots with the protection of rubber footwear Built-in double-insulating foam for incredible warmth; 3/4" removable foam liner with Thermolite insole for added comfort; achieves a comfort rating down to -75 F (-59 C); Steel shank for additional arch support; Bar Grip outsole delivers improved traction for secure movement across slippery winter terrain SAFE-TOE steel toe protects against impacts from above; ASTM F2413-11 M I/75 C/75 and CAN/CSA Z195-05 Grade 1 Recommended use: cold weather, construction, outdoor work, refrigeration, food processing, farm & equestrian