Our donut seat cushion provides long-lasting comfort by conforming to the user's natural body contours. The donut cushion's 2.75" thick memory foam relieves pressure while upgrading the comfort level of any chair or wheelchair. The tailbone pillow features a removable cover that's wrinkle-resistant and machine washable. Our tailbone seat cushion offers relief for various types of pain and can be used as a hemorrhoid pillow, sciatica seat cushion, postpartum donut pillow, after-surgery pillow, wheelchair cushion for tailbone pain, and more.