HUIERLAI Memory Foam Knee Pillow with Extra Cover by Med Sound Products - Leg Pillow Reduces Lower Back Pain - Get Rid of Your Pain & Start Sleeping Soundly! PROPERLY ALIGNS SPINE to reduce strain on lower back &amp; lower body HELPS REDUCE PAIN in lower back, knees, hips, and ankles EXTRA COVER TO KEEP PRODUCT LOOKING NEW: 100% Velour cover is washable and hypoallergenic. PACKAGE INCLUDES Knee Pillow with Cover &amp; Extra Velour Cover USE INDICATED FOR ACL/Lower Back Pain/Pregnancy/Fibromyalgia/Sciatica Pain among other medical conditions