The Jay J3 wheelchair cushion can generally be categorized as a gel cushion due to its pressure-distributing gel-filled pouch component (or as a hybrid cushion if an air PLA insert is used). Sunrise Medical—the manufacturer of this product—specifies this cushion as follows.
These Jay J3 wheelchair cushions come with Sunrise Medical's J3 cushion base. The standard unloaded J3 cushion thickness is 3.75 inches and weighs approximately 4.5 pounds (the 3.75" thickness is standard). The weight of the J3 cushion with the 4.25" deep thickness option is approximately 4.9 pounds.
The additional J3 positioning component cost is the same, regardless of the combination selected. In other words, selecting all possible J3 positioning components costs the same as selecting only one of the positioning components. This pricing structure has been set by Sunrise Medical—the manufacturer of the J3 wheelchair cushion.
As an interesting note, the inclusion of an "Air Single" or "Air Dual" PLA Insert option makes this wheelchair cushion a hybrid cushion—air and foam. The hybrid design is a result of a "supplier agreement" between Sunrise Medical and Roho. This "supplier agreement" (the phrase used in the official communication) grants Sunrise Medical a Roho-manufactured air bladder made to Sunrise Medical's specifications (the "Air Single" and "Air Dual" PLA Inserts), and grants Roho a Sunrise Medical-manufactured foam base made to Roho's specifications (used in the Roho Hybrid Elite cushion). As one might guess, these two hybrid cushions are quite similar.