Quick view Katana 555 Ski Boat I/O Boat Cover - Sharkskin SD $837.99 $527.99 Westland Exact Fit Boat Covers - Sharkskin Supreme SD Each Westland cover is patterened to account for every curve to create an exact fit. 7 Year warranty. 100% Solution Dyed Polyester - 7-1/2 oz. Durable with long lasting color. Breathable, water... Choose Options