Nat's Waterproof Boots for men are made of EVA, an antimicrobial and waterproof material. These ultra-light boots provide excellent thermal efficiency, keeping your feet warm and dry in any conditions. The one-piece molded design ensures durability, while the EVA's cushioning properties offer comfort for extended wear. Ideal for various work environments and outdoor activities. Waterproof boots made of EVA for men. Ultra light, EVA has great thermal properties and keeps you warm and dry. Antimicrobian, oil and animal waste resistant. 100% waterproof. The EVA Technology Made of EVA, an antimicrobial material, NAT’S boots are resistant to oil and animal waste. This ultra light self-insulating foam protects against cold and wetness and provides full insulation from the ground. One piece molded, EVA has no seal and, therefore, is 100% waterproof. Filled with thousands of microscopic air bubbles, EVA material is providing high thermal efficiency and excellent cushioning properties.