any personal watercraft vehicle or other object and is shown including a foot well or cavity 16 typically used by an operator to place his or her feet during operation or for other stowage purposes the cavity 16 can be representative of any surface and or space that may collect water or other environmental elements the apparatus 10 is shown having a body 12 which can be molded and or otherwise formed to fit at least partially within the cavity 16 for example the body 12 can be a positive mold while the cavity 16 defines a corresponding negative mold the body 12 can be formed from open or closed cell foam rubber plastic neoprene latex one or more polymers and or laminates one or more thermoformed materials or combinations thereof and in an embodiment the body 12 can be at least partially hollow to reduce the weight thereof the body 12 can further include any manner of skin membrane laminate covering coating and or other surface treatment on all or a portion thereof to resist or prevent growth of algae and or mold damage from ultraviolet radiation absorption of water into the body 12 and can promote a better seal between the body 12 and the cavity 16 of the jet ski 18 when installed therein while fig1 depicts.