TEMPRESS has teamed up with leading US Spinal Surgeons and Ergonomic Experts to create the break-thru patented ProBax FISHON Seat. This has no armrests so it fits excellent in tight cockpit spaces like walk around sportfishers. ProBax is the only seat clinically proven to provide optimal long-term back and upper body support.This seat comes equipped with a patented base and back dual core foam support system only available thru TEMPRESS.This system is also water resistant and durable for prolonged use. ProBax is sewn with UV and abrasion-resistant polyester thread and covered in 30-oz. marine-grade vinyl to stand up to all the elements. Eight embedded mounting inserts will fit most slider systems and any 5 inch by 5 inch mounting system when paired with the Mounting Plate (mfg #57005/West Marine #18937631). Take control of your boating and fishing experience, take control of your body and upgrade to the ProBax Captain by TEMPRESS. Made in USA. Seat Installation Instructions Seat Installation Warning