SCIATICA, BACK & HIP PAIN RELIEF: Our knee pillow fits comfortably between your knees and provides maximum comfort and support to relieve sciatica pain, back pain and pressure on the lower back. PREMIUM NATURAL MEMORY FOAM: CertiPUR-US Certified foam. The Luna knee pillow is made without ozone depleters, PBDEs, TDCPP, TCEP flame retardants, mercury, lead and heavy metals, formaldehyde & phthalate. In simple terms? This is a high grade, great quality knee pillow. ERGONOMIC, INNOVATIVE DESIGN: The knee pillow is soft and supportive, giving you a welcoming feel that stays comfortable in any position while providing liquid-like quality that contours to your body, aligns your spine and improves circulation . BREATHABLE MACHINE WASHABLE COVER: The longer silkier fibers of the breathable zippered cover increases airflow so you're always sleeping cool and is machine washable for easy cleaning REST ASSURED: We guarantee you'll love the pillow, and if you aren't absolutely satisfied, return it within 100 days for a refund, no questions asked.