Wheel Chair Cushions are Flat (2.75" X 2.75")  aid prolonged sitting under morbid state.
Thickness of Cushion (at back side) [Tb] :2.75"
Thickness of Cushion (at front side) [Tf] :2.75"
Top gel layer:   18 mm gel layer (optional: in blue and green color; configuration: box, ball and corrugated)
Top corrugated gel layer distributes pressure equally at buttocks, manages body heat (removes sweat), enhanced blood circulation and conforms body shape
Ball Type bouncing impact and elastomeric cushioning gel combination aid in blood circulation enhancement 
Box Type anti-tiring impact and elastomeric cushioning gel combination aid in relaxation of body muscles 
Sitting mass, and stability to cushion are provided by closed-cell high-density PU foam beneath a gel sheet encapsulated in incontinent-proof and breathable extension fabric (wicks away moisture and heat)
Uniqueness: Medigel Bed Sore Prevention Technology (disperses pressure equally in all directions)
Color of Fabric Cover: Black 
Generic Name of Product: Wheel Chair Cushion
Available in 03  size: Medium [M]: 14" X 14"; Standard [SD] or Queen Model (16" X16"); Large [L]  or Royal Model (18" X 18")
Indications:  Exclusively designed for Wheel Chairs only.