Kajak-Sport original hatch cover series is made of real rubber. This model is recommended for roto-molded PE kayaks, and it is the most universal for composite (i.e. fiberglass) kayaks. This is Kayak Sport's driest hatch cover solution and is created for the most demanding "expedition" use, when the cover is used in aberrant conditions and when the maximum reliability is essential.
Kayak brands that use Kajak-Sport hatches include: P&H, TideRace, CD, Eddyline, NDK (except the day hatch which uses a Valley cover), Tahe, Rebel, Zegul, Rockpool, and late model fiberglass WS Tempests.