Tempress teamed up with leading US Spinal Surgeons and Ergonomic Experts to create the break-thru ProBax® Seat. ProBax® is 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. The 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. A universal seat bolt pattern is molded into the frame to accept any 5-1/4" mounting system or pedestal. Stainless mounting hardware included. Made in USA.