Made from heavy duty marine grade 600 denier polyester, the Seal Skin 600 provides an excellent defense against mother nature's harsh elements. It's waterproof, durable and protects against rain, UV, snow & hail. Elastic hem around the parameter and heavy duty strap and buckle system gives a secure and snug fit. This all purpose cover is perfect for trailering, mooring or storage. Double stitched taped seams prevent leaks. Easy to install and extra roomy to allow room for accessories such as spotlights, seats and boarding ladders.