Sleep Yoga Knee Pillow offers perfect knee support for side sleeping. This knee pillow helps provide ultimate comfort for sore knees and ankles, support for lower legs, and can assist with pelvic and lower back tension relief. Each Sleep Yoga® Posture pillow was designed with the help of a chiropractor and is made in Southern California using a specially blended polyester fiberfill made in the U.S.A. The pillows are covered with a blended fabric of Cotton and Coolmax blend, making them soft, refreshing, resistant to wrinkles, and very strong when wet or dry. Each pillow is 100% Hypoallergenic and machine washable and dryable on a low setting for easy care. The result is a sleep product with the quality and benefits you have probably never seen nor experienced before. -Cotton and Coolmax blended fabric that is soft and cool. -Filled with blended polyester fibers for maximum support. -Ideal for all sleep positions as well as maternity body support -Machine washable for easy housekeeping. -Fabric: 80% cotton 20% polyester Coolmax. Fill: 100% Polyester. 26 in x 13 in x 3 in Domestic Material & Care Cotton Machine washable