Material: Neoprene Rubber. Heat resistant, flame resistant, sunlight resistant, ozone resistant, acid and alkali resistant, chemical resistantElastic and Perspiration: Tall rain boot featuring rubber upper with stretch-fabric shaft and moisture-wicking sock-linerNon-slip: Non-slip rubber outsoleWaterproof : 5mm CR flex-foam bootie with four-way stretch neoprene, 104% waterproof, lightweight and flexibleBreathable: Breathable Airmesh lining wicks away humidity and perspiration, and allows air to travel throughout the boot