Unique Design: Ergonomic appearance and design fits human body perfectly when sitting. Our unique design helps eliminate pain and discomfort, reduce tailbone/coccyx pressure, and promote healthy posture. Memory Foam: The main material of the seat cushion is the memory foam, which adjusts its shape to different sitting postures by adapting to the curve of the hip and eliminating discomfort. The memory foam is durable providing you comfort for a long time. U-Shape Design: The U-shaped seat cushion effectively reduces the sciatic nerve and the pain and swelling of the lower back. Driving, yoga, office work will take you a long time to sit down, our spine will feel tired because of long sitting. This cushion can help you relieve fatigue very well. Ideal thickness: The thickness of our comfortable seat cushion relieves fatigue during long journeys and in the office when working for long periods.