Waterproof and Neoprene insulated. 100% Waterproof upper and gusset. Fully lined 5mm neoprene provide both comfort and insulation. Temperature rating to -20F/-29C. Reinforced toe, heel and metatarsal areas. Adjustable gusseted fit around the calf 15-19 inch variable. Self-cleaning beveled outsole design sheds mud and debris. Slip resistant high abrasion rubber sole. Heel kicker for hands free removal. Removable foot bed.