Air-fluidized beds use fluid technology to decrease pressure through the principle of immersion while simultaneously reducing shear. Air-fluidized products permit the highest degree of immersion currently available. The surface conforms to bony prominences by permitting deep immersion into the surface. Almost two-thirds of the body may be immersed into the surface . This effectively lowers the interface pressure by increasing the surface pressure distribution area. The greater deformations possible with this technology enable the transfer of pressure to adjacent body areas and other bony prominences. Envelopment and shear force are minimized by the loose (reduced surface tension) but tightly woven polyester or Gore-Tex cover sheet.