This ventilation system is designed to improve air circulation under your boat cover and helps maintain a fresher and drier environment in the boat. Effective ventilation is essential to prevent the build-up of moisture and unwanted odours that can occur during long periods of storage or in periods of bad weather. The vent allows a constant flow of air, while protecting against rain and other external elements. The product is made of durable PETG material, which is suitable for outdoor use and can withstand the sun's UV rays and varying weather conditions, ensuring a long service life as part of your boat equipment.