1.Memory foam. 2. INSTANT PAIN RELIEF & COMFORT - If you feel stiff and sore after sitting, or experience any type of coccyx, tailbone or back pain, enjoy the relief from this comfortable and supportive cushion. It helps relieve most sitting pains like sciatica, herniated disc, coccyx injury, back pain during pregnancy, hip pain, hemorrhoids and other spinal issues by reducing pressure while sitting. 3. FOR ANY UNCOMFORTABLE SEATING - HOME - OFFICE - TRAVEL... - Easily carry your portable Dr. Flink gel cushion anywhere - office chair, wheelchair, long drives, while watching TV or using your computer, and anywhere you want to sit comfortably without pain, using high-quality memory foam that won't flatten out after prolonged use. In addition, the non-slip bottom ensures that the cushion stays in place and won't move or slide on any surface. 4. ENJOY COOLING RELIEF - COOLING GEL PAD - The revolutionary cooling gel cushion cools your buttocks and seat cushion, ensuring that you don't get hot and sweaty when sitting for long periods of time like other memory foam cushions. You can now sit in one place for long periods of time while staying cool. Cooling gel is placed underneath the cover to keep your pillow looking nice and comfortable. 5. Machine Washable - A convenient zipper allows for easy removal of the beautifully designed black cover. Simply pop it in the machine for a quick wash to keep your pillow looking clean, fresh and like new.