【 Ergonomic half-moon Design 】This half moon legs pillow is specially designed for those who sleep on their backs. It mimics your body curves, naturally fits the curves of your knees and legs, provides stable support, helps maintain a comfortable sleeping position, and reduces the need to turn over at night. 【High quality materials】Our half moon bolster pillow for legs is made of slow rebound memory cotton, which provides soft support for the knees and back, disperses pressure, and is suitable for long-term use under the knees and back to relieve pain in the back and legs.Ideal for side sleepers and back sleepers alike. 【 Optimal Comfort 】This half moon knee pillow suitable for sleeping on the back is covered with breathable knitted fabric on the surface and features a hollow design to promote air circulation and prevent stickiness due to sweating. The soft and breathable air layer fabric cover is detachable and machine washable, making it easy to maintain and allowing for a refreshing and peaceful sleep even in summer. 【 Multi-functional Usage Scenarios 】This is legs under knee half moon pillow for sleeping on back. It is half-moon not only ideal for night sleep but also supports your back, legs,knees, ankles, feet and neck. It can also be used as an office leg cushion, a travel waist support pillow, and a side support for pregnant women. With multiple uses in one pillow, it enhances daily comfort. 【 Healthy Sleeping Posture 】Improve your sleeping position with our leg half moon pillow. It promotes spinal alignment and enhances overall sleep, making it a reliable under-knee pillow for sleeping on your back. It helps relieve discomfort caused by sciatica, hip pain and back pain.