The 31" Hip Boot is made of premium 100% waterproof heavy-duty natural, hand-crafted rubber. The following features offer your workers comfort and safety: steel shank for arch support, cushioning rubber sponge insole and insulated foam rubber bottom with 8mm wool felt mid-sole for warmth, durable cotton/canvas lining and tractor tread outsole. Safety toe and steel mid-sole meet or exceed ANSI Z91 PR91 1/75 C/75. Please specify size when ordering. Sold by the pair.