Always Waterproof - All Day Comfort. The Stormburst Low Sneaker from Vessi features a rugged outsole and a soft dual density midsole wrapped in waterproof knit Dyma-tex technology to keep you dry, and comfy on the trail or in the city. Vessi's patented Dyma-tex waterproof technology is a material engineered with 4 soft and flexible layers that combine to keep your feet dry and comfortable all day long.