The Classic Deck Boot Effortlessly Combins Style With Comfort and Performance .-- Made from 100% Natural Rubber with non-Marking Vulcanized Rubber Sole with a grip pattern that works- Even in wet, Slippery Conditions. The Pure Cotton Inner Linking Offers Soft Yet Sustainable Moisture Wicking. Upper: 100% Rubber Linming: 100% Cotton Outsole: 100% Rubber