Here's what other sites are saying:
Take your Ocean Kayaks sit-on-top kayak out for the day and stay comfortable with the Comfort Pro Backrest. The thermo-molded foam supports your back so you can stay out longer. Ocean Kayaks gave the Comfort Pro Backrest a padded seat, too, so you not only stay comfortable, you stay drier.
A combination backrest and seat, the Comfort Pro Backrest provides a more comfortable ride and efficient paddle stroke. Designed to fit any sit-on-top from Ocean Kayak(R).
Thermo-molded design provides excellent back support, while the padded seat adds comfort. Fits any Ocean Kayak boat; furnishes extra comfort, support and improved stroke extension for paddling sit-on-top kayaks. Adjustable webbing straps feature corrosion-resistant brass clips for hooking on to kayak.
Ocean Kayak Comfort Backrest
Ocean Kayak Comfort Plus Seat Back
Ocean Kayak Comfort Tech Seat Back
Ocean Kayak Comfort Zone Kayak Seat Back
NRS Thwart for E-132D
NRS 12' - 13.5' Osprey Thwart & Closeout
Surf to Summit Tall Back Sit-On-Top Kayak Seat
NRS Pike Fishing IK Seat