SmartFit Detectable Triple Flange EarplugConforming Material Technology™ adapts to the shape of the surrounding ear canal when in your ear, and returns the earplug to its original shape when removed. Delivers superior comfort and a truly individual fit. Simplifies inventory control - a single product can fit almost every wearer. Blue color provides high visibility in detection. Metal ring on stem detectable by automated equipment. Body Material: TPE Molded; Color: Blue; Noise Reduction Rate (NRR): 25 dB; Packing Type: Poly Bag; Quantity: 100 pair per box; Type: Corded; Weight: 0.03 lb.