HIGH QUALITY MEMORY FOAM-The high quality memory foam in the donut pillow,will allow you to sit for a long time,will not deflate like inflatable donut cushions.without getting uncomfortable.Can be used to improve bad posture and relieve leg pain while driving or sitting for long periods,enhancing your comfort while retaining its density. . MAXIMUM RELIEF AND COMFORT:Reduces pressure on pelvic,coccyx,lower back,perineal,and anal region.Relieves pain from hemorrhoids,pressure ulcers,prostatitis,pregnancy,child birth,and lower back pain. . HEAT RESPONSIVE-The advanced memory foam pillow responds to the heat of your body to mold perfectly to the shape of your bottom.The thick foam padding compresses and cushions just enough to provide you with Acsergery that Everlasting Comfort yet keeps its shape to support your tailbone,lower back,spine and hips from those severe pressure points. . VERSATILE DESIGN-Enjoy our pillows soft exterior and nonslip gel rubber bottom.A perfect solution for your office or kitchen chair,car,truck,airplane,wheelchair,computer desk chairs at home or at work,recliner,stadium seat bleacher,and couch Can be used as a seat riser, lift cushion,or car cushion to increase the height of any seat.Its portable and small size also helps you find extra relief when you travel via plane.Plus its black cover is machine washable. .