The Knee Spacer with Memory Foam is a great solution and support for those who have difficulty sitting or sleeping due to hip, leg, back or joint pain.  The memory foam composition provides ideal long term use conforming to your body's shape.  The hourglass design promotes proper parallel alignment of the legs ,hips, and spine during sleep.  It is ideal for side sleepers. The soft and luxurious grey Velour fabric cover is removable and hand washable.