HEAVY-DUTY 600 Denier Jet Ski Personal Watercraft PWC Cover For Yamaha Wave Runner FX High Output 2004-2011 600 DENIER, HEAVY-DUTY JET SKI COVER. DESIGNED FOR: STORAGE, TRAVEL and MOORING purposes. Technologically advanced 600 DENIER Heavy-Duty Marine Grade Poly fabric for the best sun, rain, dirt, mildew protection. Rear air vents reduce inside moisture and wind lofting. Elastic cord sewn into bottom hem for a fast, snug fit. COLOR: 2 Tone: Black / Grey