VULCANIZED RUBBER: The hand-crafted rubber construction, complete with long-lasting odor control and anti-aging properties, creates a long-lasting, entirely water-tight piece of footwear. NEXT-LEVEL NEOPRENE: Combination neoprene and rubber uppers create a naturally insulated and 100% waterproof barrier that seals your body's heat in while shedding all matter of dirt and debris. GENEROUS GUSSETS: Oversized gusseted openings easily accommodate different calf sizes and allow the boots to slip on and off with ease. EVA MIDSOLES: Made of lightweight foam with thousands of compressed bubbles, our firm, yet flexible TPU shanks and fatigue-fighting EVA midsoles remain agile and adaptable in any conditions. 3M THINSULATE: Insulated options boast 3M’s synthetic fiber insulation to trap air and block radiant heat loss, offering warmth and comfort that outlasts even the longest days outdoors. 3M THINSULATE: Insulated options boast 3M’s synthetic fiber insulation to trap air and block radiant heat loss, offering warmth and comfort that outlasts even the longest days outdoors.