Shaft Height: Approx. 18'' Tall. Uncompromising scent free and waterproof protection. Contoured Ankle-Fit design to prevent heel slippage. Adjustable back gusset and strap with adjustable fit for various leg sizes. Added rubber abrasion protection in toe, heel and shin. Dual density molded PU and sponge rubber footbed. Quad-Core technology featuring four layers of cushioning and support.