Tingley Pilot Safety Toe Puncture-Resistant Knee Boots provide comfort, durability, and waterproof protection for a wide range of applications. When you are working in wet, muddy conditions, Tingley's Safety Toe Puncture-Resistant Knee Boots are enhanced for all day comfort and quality protection. Flexible, puncture resistant steel midsole meets ASTM F2413 M I/75 C/75 EH, for safety toe impact and compression, and electric hazard protection. Calf Relief Expansion (CRE) expands up to 1.5 inches for more calf comfort. Injection molded seamless construction provides 100-percent waterproof protection. Flexible upper material stays supple in cold temperatures to make walking easier. Tough outsole material for good abrasion resistance. Self-cleaning, cleated outsole spits out debris as you walk. Removable insole wicks perspiration to help keep feet dry and comfortable all day. 15-Inch height with a cutline at 12-inch to facilitate fast and clean height modification. Chemical Resistance: Fats, certain acids, hydrocarbons, caustics, and other chemicals. Ideal Applications: Construction, Agriculture, Industry, Foul Weather, concrete pouring, and other general-purpose applications. Tingley is ISO 9001 Certified.