The unique patented design of the KNEE-T helps reduce back pain by evenly supporting and holding the legs in a neutral position while on the left or right side lying positions. * The KNEE-T is endorsed and prescribed by 100"s of physicians and used by 1000"s of satisfied customers for more than 10 years and will work for you too * Anatomically accurate for exceptional comfort - Reduces back pain for side sleepers for diagnoses such as arthritis, herniated disc, sciatica and more. * Hypo-allergic materials - CertiPUR Certified HR Foam - One size fits up to 200lbs - Insurance and Medicare Billable * This product is NOT FOR PEOPLE OVER 5"10" FT TALL OR MORE THAN 185 Lbs. YOU NEED THE KNEE-T "PRO" MODEL See review below for link to PRO or try the Memory foam version for softer more luxurious feeling