The Nelson-Rigg Defender All-Weather Motorcycle Cover is made from a waterproof medium weight UV-treated "Tri-Max" polyester. It features a ventilation system to minimize condensation build-up and allows for constant air circulation.; 100% waterproof Medium weight top quality Tri-Max treated polyester UV-protected Double stitched Electrically heat sealed seams Silver heat resistant lower panels protects from hot exhaust pipes Soft windshield liner Snug elastic bottom 1" grommets at center and front wheel Perma-Venting system prevents condensation build up Allows constant air circulation 5-year manufacturer warranty