Air bubble in the tip provides cushioned comfort. Easy grip handle. Easy insertion in any size ear canal. Pocket-Pak® carrying case for plug storage, slips easily into pocket. Washable and reusable. Bright blue detectable model is ideal for food processing use.. Corded/Cordless: Corded; Shape: Flanged; Material(s): Foam; Noise Reduction Rate (NRR): 27 dB.