Designed for some of the coldest conditions, the Arctic Sport II works great in nearly every environment. These fun sporting colors make them perfect for trekking in the back woods but also just enjoying the great outdoors. 5mm CR Flex Foam neoprene is 100 percent waterproof with exceptional comfort, flexibility, shock absorption and heat retention properties. Soft fleece lining enhances comfort, provides superior warmth, and is durable for long cold treks.