Ozone-resistant abrasion-resistant scent free rubber offers 100% waterproof protection - Our premium rubber compound has a high tensile strength which means greater tear-resistance and greater durability - 9mm wool-felt midsole with a foam insulated bottom gives insulation from cold ground and cushioning comfort - Developed in 1963 LaCrosse Ankle-Fitdesign features a narrowed ankle pocket that grips the top of the foot better and locks the heel in place preventing excess rubbing and chafing - Removable EVA footbed adds cushioning for all day comfort - Cam-loc buckle supplies a customized fit and is easily adjustable to accommodate clothing - Air-Grip outsole delivers outstanding all-around traction in mud snow and other loose terrain - Fiberglass shank - 5.3 lbs per pair - Soft toe (not a safety toe)