The Boat Vent Aero™ is a lightweight vent that brings needed air circulation to tightly fitting covers. Condensation can be in a problem in covers that are made from fabrics that do not breathe, adding a vent allows air to flow under the cover preventing mold and mildew growth. The Boat Vent Aero is a sew-in vent that installs directly into your cover. The optional louvered front can be added to keep out rodents and bees. It also provides extra protection from heavy rain. This soft rubber vent also features an aerodynamic shape that makes it perfect for use on trailering covers or any marine cover, truck and equipment cover or tent.