This strong, durable, water-resistant cover is 100% polyester. It features zippered cutouts for the backstay, sidestay, and forestay. Zipper from sidestay to mast on starboard side. Wraparound collar with cord. Vents between mast and forestay and at transom. Web tabs with 3 grommets on port and starboard sides for trailer tie downs. Each cover is custom fit.