Silver Jet Ski PWC Cover Kawasaki STX 900 / JT900 1997-2006 420 DENIER WOVEN POLYESTER MATERIAL. Designed for storage and trailering pursopes. Semi-custom fit Jet Ski cover with an integrated trailering system Technologically advanced 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: Reflective Grey