The Gatorback Pro-Comfort Ventilated Back Support Belt (Medium) (B400-M) is designed for both comfort and durability. ​Molded air-channels prevent over heating through ventilation and ultra-breathable fabric and the memory foam back support is designed to provide unmatched comfort. Every stress point is reinforced with extremely strong bar-tack stitching and heavy duty metal rivets to ensure product durability, the metal suspender rings are triple stitched onto the belt so they will never rip out and The 2" nylon belt itself is made with a double metal buckle and a leather tip that is stitched around the entire edge. The belt will never stretch and fasten securely. Medium- 31"-34".