I used this for about a month after giving birth. It helped to reduce the pain when sitting, so I'm glad I had it after delivery! Materials: Main fabric: Polyester Cushioning material: Urethane foam ★About the product★ The three-dimensional backrest supports the lower back. It comfortably wraps around the pelvis 360°♪ The indentation in the seat gently catches the buttocks. The three-dimensional backrest supports the lower back, allowing you to sit straight.