Ozone-resistant abrasion-resistant rubber offers 100% waterproof protection - Our premium compound of rubber 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 - Removable EVA footbed adds cushioning for all day 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 - Extended sizes available for women or those with smaller feet - Chevron cleated outsole is ideal for sloshing through mud and water. The large cleats shed mud and debris while giving you great grip and traction. - Fiberglass shank - 4.5 lbs per pair - Mild comfort zone rating: -20Adeg to 60AdegF - Soft toe (not a safety toe)