Koverz Custom Fit Outboard Engine Covers are designed to protect your Cowling while adding style to your Boat! Designed to remain on the Engine while running, the vented cover allows air to the intake ports. The premium woven polyester is UV treated and water repellent. The soft felt inner lining ensures that your Cowling will be protected. Personalize your Boat and protect your Engine from UV, Fishing and Skiing damage. Use of UV Protectant Sprays will help preserve the vibrant colors of your Koverz Custom Fit Boat Engine Cover.