Reduce hip, knee & back pain using a knee pillow. Place the pillow between your knees & attach to your leg to keep your hips aligned during sleep. Available in: Original foam - soft - supportive foam core. Memory foam - soft - for additional tailored pressure relief. British Wool - medium - OEKO TEX standard 100 adjustable wool ball filling. Organic Buckwheat Hulls - firm - for a cooler, firmer, natural alternative (please note buckwheat hulls are louder than foam). Product features: Improves hip & spinal alignment during sleep Keeps knees apart when sitting, sleeping or in a wheelchair Comes with removable, zipped, washable 100% cotton cover Cover has built-in adjustable strap that can be fastened to either leg Handmade in the UK 1 year guarantee Helps heal & comfort: Aid to recover post hip & knee surgery Back pain Hip pain Knee pain Size : 23cm x 15cm x 9.5cm (roughly)