Memory Foam Seat Cushion: Our office seat cushion is made of high quality memory foam, enhance your posture and cradle your thighs and hips, and effectively distributes pressure, thus reducing discomfort caused by prolonged sitting. ergonomic "U" shaped hollow design not only helps to reduce the pressure on your sit bones, but also provides an unrivalled comfort experience Sitting Comfortable, Pain Free: Our tailbone seat cushion is designed with unique warped edges to provide good support for the back and hips, effectively relieving back and hip pain and helping to alleviate all kinds of discomforts caused by the weight of the body pressing on the tailbone area. Ideal for relieving sciatica, lower back pain, herniated discs and other conditions Multi Use Seat CushionsThis office seat cushion has a large size18.9''x15.74''x5.1''design, which can match perfectly with all kinds of chairs, such as office chairs, car seats, sofas, dining chairs, outd