The BoatTector Versa Vent provides excellent airflow inside your shrink-wrapped boat, helping alleviate the musty smells and condensation build-up commonly found during winter storage. Once installed, simply puncture the interior of the vent to allow maximum airflow in and out of your stored boat. The roofed vent style seals itself against the leaking moisture of rain and snow while remaining open to let the air freely flow in and out. The Versa Vent is perfect for any number of shrink-wrapped applications, including winterized boats, farm equipment, storage containers and more. in some applications, such as thicker wraps and canvas, the surface may need to be pre-cut to provide the easiest installation. Shrink-wrap tape is required to fully secure the vent in place (shrink-wrap tape sold separately).