STORAGE Sea Doo Sea-Doo Bombardier GTI SE 2017 Jet Ski Cover STORAGE JET SKI COVER. DESIGNED FOR STORAGE PURPOSES ONLY. 210 Denier Marine Grade Woven Polyester Material. Semi-Custom Fit. The Fabric is Breathable, UV Proof, designed for all weather protection and to Resist Mold, Mildew,UV Rays to keep your watercraft brand new looking Heavy-Duty elastic shock cord in the hem of jetski cover, Strap in the middle to keep in secured. Free Storage Bag.