Max Single-Use EarplugsBell shape delivers maximum in-ear comfort. Contoured design easier to insert, resists tendency to back out of ear canal. Polyurethane foam enhances comfort, especially for long-term wear. Smooth, soil-resistant closed cell-foam skin prevents dirt build-up. Body Material: Foam; Color: Coral; Noise Reduction Rate (NRR): 33 dB; Packing Type: Bag; Quantity: 200 pair per box; Type: Uncorded.