The basis of Vicair® technology is the tetrahedron shaped SmartCells that are filled with non-flowing air. Each cushion is filled with hundreds of these SmartCells that are virtually indestructible and require few adjustments. SmartCells conform to the body's contours to provide pressure redistribution. Compartments are adjustable for individual and changing needs, even while seated. Stability is achieved as the cells do not migrate from the cushion’s compartments, move with minimal friction, resemble viscous fluid, and allow the cushion to adapt to the body.