Quick view Ultra 21 XTX Boat Cover - Sharkskin Plus $678.99 $427.99 Westland Exact Fit Boat Covers - Sharkskin Plus Each Westland cover is patterened to account for every curve to create an exact fit. 5 Year warranty. 100% Acrylic coated polyester - 6-1/2 oz. Lightweight and durable. Breathable, water repellent, mildew... Choose Options