Got'urBack (Medium) Universal Back Support, Posture Correction Strap for a Better Back Fully adjustable for a perfect fit (M fits 26-36 waist, 5'2 - 6'1 height) Medical-grade material and workmanship. 100% satisfaction guarantee. Trains user to sit with correct posture, "virtual" backrest for multiple applications Breathable back and knee pad with anti-slip silicon tape sewn in. Zippered design w/carry strap for easy carry and storage.