The J3 cushion was designed with careful consideration for the Science of Seating. The PLA (Pelvic Loading Area) insert is available in four options: Factory Filled JAY Flow™ fluid, Field Variable JAY Flow™ fluid, Air Single ROHO® DRY FLOTATION® Technology, and Air Dual ROHO® DRY FLOTATION® Technology. These four inserts allow the choice of either air or Jay fluid to ensure the best possible immersion, pressure distribution, and stability. The result: A cushion that features outstanding pressure distribution, comfort, heat and moisture dissipation, and optimal stability. It is comfortable, easy-to-order and can accommodate changing needs. It's a perfect new member of the JAY Family!