As the first boot built around the 'Sure Tread' deep cleated outsole, Stream II remains a trailblazer in the premium wellington category. The adjustable rear calf strap offers a clean and assured side profile. Waterproof rubber upper. 3.5mm insulated, Neoprene lining. Adjustable rear calf fitting. Internal structured heel support. Rubber kicker. Rubber 'Sure-Trend' deep cleated sole. Padded, removable insole. Unisex sizing.