Tush Cush Orthopedic Cushion. Firm, wedge shaped cushion is ideal for use during floor exercises and for individuals who must sit for long periods. Cushion tips pelvis forward to comfortably align spine and reduce stress on lower back. Sensitive coccyx area is suspended over U shaped cutout to decrease pressure on tailbone. Polyurethane foam tapers from 2 3/4" to 1" high. Vinyl cover Latex-Free