This posture corrector belt features built-in back support bones to help support natural posture. - Brand: DEZIYUA - Type: Posture Corrector Belt - Size: Medium - Target: Unisex - Function: Supports natural posture - Design: Built-in back support bones Thank you for viewing. Used only a few times. Used only at home. It is in relatively good condition, but please understand that it is a used item before purchasing. This item only, no instruction manual.