Caterpillar Men's Kaufman Hi Waterproof FF Steel Work Boot 100% Leather Rubber sole Full grain leather/mesh upper Waterproof - Cat waterproof footwear keeps the wet out with waterproof leathers using seam sealing or waterproof liners. FreezeFlame - Designed to withstand extreme heat and cold conditions- FreezeFlame footwear features a special outsole with unique compounding that is engineered to maintain its performance to temperatures as high as +250 degrees C. Electrical Hazard protection - Cat Electrical Hazard footwear is rated ASTM F2413-11 1/75 EH. Special EH construction protects the wearer against open circuits up to 14-000 volts in dry conditions. Nylon mesh lining