Foam fenders absorb impacts whilst the skin resists wear and tear in an aggressive environment. The Foam Fenders, Donuts and Buoys share a construction technology centred on a closed-cell polyethylene foam core and an outer skin of reinforced polyurethane elastomer. The closed cell foam structure makes punctures a thing of the past. Every cell is separate and so water cannot migrate into the foam. Even after many years active service, the foam core can be returned to the factory, re-skinned and made ready for a new lease of life.