Ergonomically designed, O shape , sure the air flowing, not hot for long time sitting. provides support and comfort while reducing pressure on the tailbone with the O-shaped cut out and promotes posture. reducing pressure on the coccyx / tailbone and promotes posture.BREATHABLE REMOVABLE AND WASHABLE: Mesh ventilative cover keeps air circulating so sweat and doesn't fill it up, nylon material, breathable and cool. Soft memory foam material, good elasticity, relax your hip. to keep you relaxed and comfortable all day long.PROVIDES LOWER BACK PAIN & SCIATICA RELIEF:Supports recovery from lower back problems, helps with most sitting pain due to sciatica, herniated discs, tailbone injuries, pregnancy, hip pain and . Our seat cushion is designed to help relieve pain while sitting The seat cushion can help relieve body discomfort for long time sitting..SUITABLE FOR: This cushion is for office, family, travel, seats or wheelchair use. If you usually work in the office for a long time, feel pain in the waist and back, with this cushion, you can well relieve the discomfort caused by sedentary..BEST GIFT: In order to pay attention to the problems of your family, colleagues, lover, friends' back and hips, you can give this cushion as a gift so that they can enjoy each day of relaxation. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.