FULL THROTTLE Cove Cushion Blue A multi-functional water accessory, the Full Throttle Cove Cushion is a non-USCG approved flotation cushion providing a floating seat with backrest for relaxing in the pool or lake. It is also great to sit on for extra cushion while paddling your canoe or kayak, or added cushion for your boat seat. The Cove Cushion can also double as a boat fender or bumper to protect your boat.