Bottom covers are great for sailors who travel frequently or storing for the boat in the winter. Harbor Time Edge is a great fabric protects your hull from stones kicked up from the road when traveling. Harbor Time Edge is 11oz coated polyester fabric provides excellent UV protection. Superior heat reduction rating and 7 year fabric warranty makes this fabric industry favorite. The attachment points of the cover are constructed from 10-inch shock cord skirt and four buckled straps pull the cover tight for a superior quality fit. Made in the USA.