Tempress has teamed up with leading US Spinal Surgeons and Ergonomic Experts to create the break-thru patented ProBax® Elite Seat with Arms. 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. 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 5-1/4" mounting system when paired with the Elite Mounting Plate. Take control of your boating and fishing experience, take control of your body and upgrade to the ProBax™.