Vico Marine is happy to introduce a new vent to its line up! The Boat Vent 4. Made from durable soft material, the vent is soft enough for sewing, but tough enough for the outdoor elements your boat cover will go through. For those who require a sew in style vent, this is your number one choice. Key features include screw-in style lead-in, removable top umbrella for easy access, and improved venting.