Howard Leight by Honeywell high NRR plugs deliver superior noise-blocking performance. Contoured bell-shaped design provides an excellent ear-canal fit with enhanced back-out resistance. Soft expanding polyurethane foam ensures a comfortable fit. Smooth soil-resistant closed-cell foam skin protects against dirt buildup. Color(s): Coral; Corded/Cordless: Corded; Material(s): Polyurethane Foam; Noise Reduction Rate (NRR): 33 dB; Quantity: 100 Pairs; Shape: Bell; Size Group: One Size Fits Most Post-Consumer Recycled Content Percent: 0%. Pre-Consumer Recycled Content Percent: 0%.