The Bucket Boss Adjustable Black Back Brace Back Support Belt in size medium is constructed of thick elastic for flexible support and comfort. The back brace style work belt features a fully-enclosed spring steel frame and is wrapped by 4 in. wide elastic bands that are easily adjusted with a hook and loop closure. The back brace style back support work belt is equipped with 1.25 in. W adjustable, elastic suspenders and accommodates waist sizes 32 in. to 38 in. The Bucket Boss Adjustable black back brace support work belt comes in medium, large, and extra-large sizes which are all fully adjustable. Today, Bucket Boss carries over 100 different products that organize and hold tools in the strongest, most efficient ways. For 30 years, we have prided ourselves in creating durable products that can withstand many years of wear and tear. We strive to stay ahead of the pack by constantly upgrading features and using the best quality materials on the market to create the best product for our end users. Material: Polyester.