Those who suffer from tailbone pain find the coccyx cushion the most comfortable due to the cut out at the back of the cushion. This cut out design significantly reduces pressure on the tailbone. The Carex coccyx cushion is ergonomically designed to provide support while reducing direct pressure on the tailbone. The Carex coccyx cushion is made with premium quality self molding memory foam that reacts fast to provide instant relief and comfort and provides slow memory foam recover for longer support. The removable soft polester and rayon cover zips off easily for machine washing while the transport strap provides convenience for travel. Hypo-allergenic.