EXTREMELY 3D BREATHABLE MESH COVER--Allows airflow through the cushion to keep our buttocks support cushion has a ventilated and comfortable all day.Still very cool in hot summer day. SUPPORT TAILBONE & SCIATICA RELIEF--Our Seat Cushion is specially designed to provide ultra support and comfort, while reducing pressure on the tailbone and coccyx, and encouraging healthy posture.The cushion helps to support with recovery from lower back problems, herniated discs, pain stemming from sciatica, tailbone damage, pregnancy back pain, hip pain, hemorrhoids and any other spinal issues or discomforts. FIRMNESS AND SOFTNESS MATERIAL--high quality memory foam has strong support for your back, absorb all pressure from your buttocks and rebound slowly to original shape,your buttocks is ably supported even after hours of sitting. It is carefully crafted to ensure the best user expereince, long-lasting support! BUTTERFLY SHAPE PROVIDES OPTIMAL SUPPORT FOR BUTTOCKS--The Seat Cushion gently support your buttocks and the back of your upper thighs with its contoured foam structure. The butterfly shape is designed to evenly distribute weight and promote proper posture and spine alignment. NONSLIP RUBBER BOTTOM - Rubber bottom surface helps grip your seat for more stability and safety.and the cover with a zipper for easy remove outer mesh fabric to keep fresh and clean sitting all the time.