The Vicair Vector O2 wheelchair cushion — the manufacturer's replacement for the older Vector X model — can generally be categorized as an air cushion due to its weight bearing air-filled cells. The manufacturer of this product, Vicair (in the USA - The Comfort Company is the source) specifies this cushion as follows.
Vicair's Vector O2 consists of a pre-contoured array of 9 individually adjustable chambers. Each chamber contains a user-changable quantity of permanently sealed tetrahedron-shaped air cells.
Vicair accomplishes the weight bearing function differently than other manufacturers of air cushions. The Vicair Vector O2 employs many small permanently sealed air filled cells, rather than larger valved air cells. Each of the many small Vicair air cells is shaped like a tetrahedron (a volume enclosed by four sides). The feel of the cushion can be adjusted by unzipping the liner and removing or adding an appropriate number of air cells. A pack of 50 extra air cells may be purchased with the cushion (refer to the cushion options above).
The Vector O2's many-cell structure eliminates the leak-related catastrophic failure mode associated with other types of air cushions. The tetrahedron-shaped cell structure also slightly increases the user's seating stability as compared to typical passive, valved-type air cushions.
The O2-series covers include Incotec and Comfair. The Comfair cover is the more breathable of the two covers, the Incotec cover being designed as an incontinence barrier.
When filled with air cells, this cushion's center front pommel can be helpful in two ways. First; for people with dominant adductor hip muscles, the pommel helps prevent the knees from pressing against each other. Secondly; and to a lesser extent, the pommel can be mildly effective in helping prevent slipping into a sacral seated position (i.e, slumped with hips too far forward),
NOTE ABOUT SHIPPING: Vicair Vector O2 cushions are made-to-order. The manufacturing process typically takes 4-5 business days. For example, if the "Fast" shipping method is selected for a Vicair Vector O2, the actual transit time will indeed be fast (1-2 business days), but your cushion may be delayed by 4-5 business days before leaving the facility. Additionally, non-standard sizes (sizes highlighted with colors) require substantially longer lead times. Please consider these manufacturing times when selecting the shipping speed for Vicair cushions.