Featured on the new Tetra Series and many of the 2013 Ocean Kayaks, he Comfort Hybrid Seat features a comfortable seat back height for additional lumbar support. The seat is attached to the kayak so it won't slide while in use and it easily adjusts so you can find the most comfortable position for your water adventure. Bungee on the back of the seat back allows you to stow some gear. Removing the seat back (if necessary) is easy. Seat bottom screws into boat hull, so this is not designed as a retro-fit product, only as a replacement