Muck Boot Men's Pursuit Stealth Hunting Boot 100% Synthetic Imported Rubber sole Shaft measures approximately 13" from arch Boot opening measures approximately 16" around 100 percent waterproof Fully insulated with 6 millimeter CR flex foam which provides optimal warmth Lightweight and cushioned ethylene vinyl acetate midsole Fleece lined for added warmth Spandura added to the exterior of the neoprene for added protection against wear and abrasion