【Anonymous Delivery】 【Recommended by a Chiropractic Clinic Director】 High-quality urethane provides a high-resilience material that is resistant to sagging and supports stable posture. Thanks to the forward-sloping shape, the back of your thighs won't hurt when sitting. 【Washable】 The cover that touches the skin can be removed and washed, so you can use it cleanly. 【Non-Slip Processing】 Non-slip processing on the back of the cover ensures it won't slip on floors, sofas, or chairs. I liked the one I found in the waiting room of a maternity clinic and bought the same one later, but I received a similar product as a gift, so I've only used this one a few times. It's in excellent condition with no sagging or fraying. I liked that it wasn't the typical donut cushion design, but rather a fabric with a color and texture that blends in with the interior. Other shapes I tried during my hospitalization – the C-shape (a type where the circle isn't closed) – would open up and collapse under my weight when I sat on them, which was no good because it would press on the affected area. The perfectly round ⚪︎ shape hurt the back of my thighs. I thought the oval shape, forward slope, thickness, and firmness of this product were well-considered. I understood why it's a bestseller. The latest version of this series has been upgraded to be even thicker → ¥3980, but this product is the standard version. Please try it for ¥999, including anonymous shipping. Donut Cushion Premium Memory - Foam Equipped Model, Postpartum Posture Assist, Car Front Sloping Specification, High Resilience (Firm), Donut Cushion, Compliant with Japanese Safety Standards Seat Cushion For hemorrhoids/postpartum/episiotomy/maternity/breastfeeding