LaCrosse Men's Alphaburly Pro 18" Hunting Boot 100% Neoprene/Rubber Imported Lug Sole sole Shaft measures approximately 16" from arch Boot opening measures approximately 16" around Hand-laid premium rubber over a 3.5mm neoprene core for flexible, waterproof, scent-free comfort Embossed liner increases air circulation inside the boot, wicks moisture and is quick drying. Nylon Shank Active Fit with adjustable neoprene gusset for easy on/off and a secure, comfortable fit on foot Multilayer rubber on the toe and heel plus a double-layer vamp of added support and durability