1. Ergonomic Design: The side sleeper pillow has a special heart shape that supports legs and knees, thus also bringing back and hips into a natural position. The beautiful heart shaped knee pillow can be a great gift for friends or elders in your family. 2. Stay in shape: The knee pillow is made of high quality memory foam, which adapts perfectly to the individual leg shape and maintains its original shape after sleep. With an elastic band, the leg pillow helps maintain the sleeping posture all night long. 3. Comfortable Sleep: The leg pillow provides optimal comfort for those who sleep on their side. The breathable material and central hollow chamber allow air to circulate for a cool, restful sleep. A more relaxed posture during the night can improve your sleep quality and make you more refreshed the next day. 4. Easy to Clean: The memory foam pillow comes with a removable and breathable zipper cover, which helps keep the pillow from getting warm. It is machine washable for easy cleaning. If necessary, it can also be easily washed by hand. The cushion cover is made of polyester fabric, which is durable and elastic.