I cover or shrink warp my boat for the winter. Do you? Maybe this is timely for both of us then. Venting / breathing under that cover is important to properly protect your boat and all the seats/parts/materials/electronics in it.
Marine manufacturer’s comment…”Boat Vent 3 is an improvement on Boat Vent II, which made its name in the marine industry over the last two decades through adding value to covered boats by venting and tenting, preventing mildew and mold. Molded from the highest UV inhibited plastic on the planet, it can be installed to virtually any boat cover. Boat Vent 3 features four major improvements over Boat Vent II: – 40% more venting – Overhanging top to allow in less moisture – 30 teeth on the washer for a better grip – Ergonomic reversible nut for easy installation.”
These folks have been inventing/making/delivering within the marine industry for better than 30 years.