Max Disposable Earplugs Max Pre-shaped Foam Earplugs with poly Cord. Smooth, soil-resistant closed cell-foam skin prevents dirt build-up. Polyurethane foam enhances comfort, especially for long-term wear. Contoured design easier to insert, resists tendency to back out of ear canal. Bell shape delivers maximum in-ear comfort. Body Material: Foam. Color: Coral. Maximum Attenuation Frequency 46.200 dB - 8000.000 Hz. Noise Reduction Rate (NRR): 33 dB. Quantity: 100 pair per box. Type: Corded.