Product details:

Marine-grade vinyl tough enough to withstand years of heavy use Aluminum hinges and high-impact injection molded plastic seat frame Generous high-compression foam padding provides a maximum of comfort Mounting hardware and tie-down straps included. Backrest folds down when not in use! Fits standard 5"x 5"mounting bolt patternMarine-grade vinyl tough enough to withstand years of heavy use.
Aluminum hinges and high-impact injection molded plastic seat frame.
Generous high-compression foam padding provides a maximum of comfort.
Mounting hardware and tie-down straps included. Backrest folds down when not in use!
Fits standard 5"x 5"mounting bolt pattern.