The Alerta Safety Side Wedge Set is designed to protect those in care and help keep them comfortably positioned in bed. Made from high density foam with a wipe clean cover, it has a draw sheet and two built-in straps that secure the wedge set to the bed. 2 sets can be used down the length of the bed for extra protection if required. Alerta Medical bed protection is made with PU (Polyurethane Fabric) instead of PVC due to risks of Phthalates with PVC. PU is safer and higher quality, breathable and serves a longer lifetime.