Ergo21 LiquiCell Coccyx Seat Cushion for Wheelchair, Office Chair, Car, Tailbone Pain Relief, Lower Back & Sciatica Buttock Pain, Coccyx Pillow for Sitting (17.5" W x 15.5" L x 2" H)

Special rear cut out helps to relieve pressure points under tail bone - 4 Sizes Available. Regular is for less than 175 lbs. + or smaller chairs. Large is for 175 Lbs. + Large Deluxe is for 200lbs + and Extra Large for 225 lbs. + Tip: You may also want to measure your Chair or Car Seat. If your seat is large enough, then you may want to order the Larger Sizes Uses: Home, Office, Cars, Trucks, Recliners, Meditation, Wheelchair, Recreation, Concerts, and more. Reduce fatigue, numbness & tail burn - Enjoy sitting for longer periods of time with the four-patent pending LiquiCell membranes to improve blood flow and circulation to prevent sores and skin breakdown from vertical pressure. Ultra-thin cells contain liquid that's in constant motion allowing your body to glide and float - non-skid gripping bottom with carry handle. An aid for buttock pain, hip pain, groin pain, leg pain, sciatica, and other issues involving sitting