Vicair Technology cushion features a lightweight and stable air cushion that uses a unique combination of Comfort Cells and silicon gel. By solely sitting on the cushion with the air valve open, the Comfort Cells will shift throughout the cushion, eventually adapting to all body contours of the user. Once the shift of Comfort Cells is complete, then close the air valve for optimal pressure reduction. The Comfort-Tek multi-dimensional stretch cover alleviates pressure on bony prominences.