MAR-MTRCV-ER-10 - This particular cover is for all F4, F6, F8, F9.9, and F15 4-Stroke Yamaha Outboards, except F15C. It is also applicable with 6, 8, 9.9, 15, and 20 HP 2-Stroke Yamaha Outboards. The cover is constructed of durable 600 denier solution-dyed polyester fabric. This non-abrasive, water resistant cover is also resistant to UV rays, mold, and mildew for added protection of your coveted Yamaha outboard. The cover features an adjustable snap-buckle strap for a secure and snug fit.