Feature: - Maximum support with additional elastic outer belt & 8stays - Ventilated material for longer wear time - Reduces muscle fatigue to help maintain proper posture alignment Applications: - se with symptoms due to lumbar disc syndrome; - Acute back muscle spasms; - Radiating nerve pain to lower extremities SIZE : Measure around the waist: S = 23 - 28 (inch) / 58.4 - 71.1 (cm) M = 28 - 33 (inch) / 71.1 - 83.8 (cm) L = 33 - 38 (inch) / 83.8 - 96.5 (cm) XL = 38 - 43 (inch) / 96.5 - 109.2 (cm) What's in the Box : 1piece x Back Support W/Stays