Bamboo Prince 3005 Comfort American Memory Foam Seat Back Cushion for cars, wheelchairs, and chairs - Two positions usage, Anti-bacterial Bamboo Fiber Cover Bamboo Dimensions 17"x17"x4". Our memory foam is softer than our competitors. Comes with World's best BASF Pluracol, the memory foam in Made in USA by BASF in North Carolina,USA) slowest recovery memory form material maintains shape for correct support. Don't be fool by many cheap memory form pillows or bamboo pillows. When you press them down, they all recover in less than 1 second and are low density at 1.5 lbs ft. . The BASF memory foam is high density at 3 lbs-ft. It recovers in 5 to 7 seconds. NEW DEEPER ERGONOMIC SHAPE to hug your butt as you sit, eliminating point pressure and distributing support evenly so you can sit for longer without discomfort, improving posture and providing superior comfort. Ergonomic shape developed by doctors to promote proper back alignment and support. A GAMECHANGER FOR BACK PAIN - MAXIMUM BACK SUPPORT FOR PAIN - Chiropractors emphasize support as being most important for back health. This back support pillow can be use in 2 positions, one is at the back with the sharper edge pointing up. A second way is on the bottom as a seat cushion. Both ways are very comfortable. The seat back application is preferable. You'll never go back to sitting the old way again. Bamboo fiber cover make it softer and cooler to touch. Bamboo is naturally anti-bacterial so it is not so easy to mold over time even you sweat on it. Zippered, washable velour cover for easy cleaning. Great for wheelchair and automobile use too.