The Carex® Knee Pillow is ergonomically designed to provide ideal spinal alignment to help reduce lower back, leg, hip, ankle or joint pain.  Use while sleeping or sitting to improve circulation and decrease pressure and strain on those areas.  The removable soft polyester and rayon cover zips off easily for machine washing.  Hypo-allergenic.  Blue cushion measures 10.5"w x 7.75" h x 8"d.