WindStorm fabric uses advanced MicroPore technology that is exclusive to the brand. This MicroPore technology promotes mildew resistance and provides WindStorm the ability to be the fastest drying cover on the market. The MicroPore innovation gives WindStorm the unique advantage of being the best trailering cover on the market, highly reducing drag while on the road. All WindStorm Semi-Custom Boat Covers are backed by an unbeatable 7-year and include a matching motor cover that doubles as a stuff sack and a heavy duty strap set. WindStorm has been proven to deliver the best, longest lasting protection.