Airgo ultra lightweight knee boot. Airgo boots are 70% lighter than other waterproof rubber and PVC knee boots. Made from high quality EVA for comfort and durability. Black upper and black outsole in a multi-purpose, cleated tread pattern. 100% liquidproof. Tiny air bubbles trapped in the walls of the boots are self-insulating to help keep feet warmer in the cold and cooler in the heat. Removable, cushioned, contour insole. Heavy duty heel kick for hands-free removal. Available in men's sizes 6 through 13. Retail box packaging. Ideal applications: agriculture, light industrial, construction, foul weather and other general purpose applications. Chemical resistance: certain acids, alkalies, fats, oils and hydrocarbons.