Ergonomic Design: The zoned design that fits the hips can reduce the pressure on the legs, sit bones and tailbone, give support to the sacrum, help improve sitting posture and alleviate postural/joint problems Adjustable Buckle and Moderate Softness: Memory foam; moderate softness; with size adjustment buckle, you can adjust the size to meet your needs Hollow Out Design and Breathable Fabric: Hollow out and W curve design relaxes the legs, upgraded ventilation holes on both sides to relieve the buttocks from sitting for a long time. Helps prevent and improve hemorrhoids Dense Non-slip Particles: The bottom of the cushion is designed with non-slip particles, solid and not easy to slip, the front high and back low design collects the buttocks curved surface to release the pressure of the buttocks shaping Comfortable and Enduring Cushion: Invisible zipper design, the zipper head can be cleverly hidden, beautiful shape and avoid scratches. Comfortable and enduring