The Jay® J2TM wheelchair cushion can generally be categorized as a gel cushion due to its pressure-distributing fluid-filled pouch component. Sunrise Medical—the manufacturer of this product—specifies this cushion as follows.
The optional plywood board - the rightmost element in the picture - is sold separately (it does NOT come with this cushion). Sunrise Medical's "Ballistic Stretch" cover comes with this J2 wheelchair cushion. An "Air Exchange" or "Incontinent Resistant" cover may be substituted as indicated above in the cover options.
NOTE: If you need this cushion shipped fast (i.e., next day), please call first to ascertain the stock status. If a J2 of your specific size is not on-the-shelf, you will need to add an additional 3 business days to any shipping method chosen.