The Bluestone memory foam Donut cushion will add relief and comfort to any seat. Made of memory foam, this cushion will not flatten out with prolonged use or deflate like inflatable donut cushions. Features an opening in the center to relieve pressure on the tailbone. This cushion is ideal for hemorrhoid sufferers or those with lower back pain. The ring shape distributes body weight evenly without putting pressure on the perineum. This allows for effective pain relief and promotes healing of the affected area. The cushion is great for your home, car or office to help ease the pain of sitting. Includes a gray zippered plush cover that is easily removable and machine washable.