Donut Seat Cushion With Memory Foam, Comfort Support Pillow For Back Pain, Tailbone, Pregnancy, Prostate, Surgery, And Post Natal Relief By Bluestone The Memory Foam Oval Donut Seat Cushion by Bluestone will add ultimate support, comfort, and relief for you any time you take a seat. This soft and comfortable memory foam pillow diminishes discomfort by reducing the burden placed on pressure points which can cause pain. Ideal for pain management for back and tailbone, and comfortable sitting in the home, office or car, this donut cushion is just the relief you have been looking for.