By inflating the cushion and sealing off with the transport cap you can create a balanced-air self-adjusting semi-active cushion. The Alerta Sensaflo Hybrid incorporates cutting-edge SensaCare Truflo Technology®; with constant pressure sensing through an air sensor and microcomputer regulator to provide ultra-low interface pressure, and ultra-silent pump operation to promote an even ambience for natural comfort and stable blood circulation.