Wow! This helps relieve back pains! This contoured superior memory foam knee pillow with washable cover allows for a comfortable all night's sleep by elevating your upper knee while placed between your knees. The therapeutic side sleeper body positioner - encourages the correct posture. No more restless nights. Eases back, leg, knee, ankle and hip joint pain by providing proper spinal alignment and reducing pressure while sleeping. Just insert the bolster in between your knees and sleep on the side most comfortable for you. Customers report great comfort when using our premium knee pillow for sleeping on their side. Free Shipping In 3-7 days!