1. Unique design: The appearance and ergonomic design perfectly fit the human sitting posture. Our unique design helps eliminate pain and discomfort, reduce coccyx/tailbone pressure and promote healthy posture. 2. Memory foam: The main material of the seat cushion is memory foam, which can adjust its shape according to different sitting postures, fit the hip curve, and eliminate discomfort. Memory foam is durable and provides you with long-lasting comfort. 3. U-shaped design: U-shaped seat cushion effectively reduces sciatic nerve and waist pain and swelling. Driving, yoga, and office work take up a lot of time sitting, and our spines feel fatigued from sitting for long periods of time. This cushion can very well help you relieve fatigue. 4. Ideal Thickness: The thickness of our comfortable seat cushion can relieve fatigue during long trips and long working hours in the office.