Ideal size for workers with smaller ear canals. Low pressure polyurethane foam expands gently for comfortable long-term wear. Contoured T-shape for easy handling and wear. Smooth, soil-resistant closed cell-foam skin prevents dirt build-up. Complies with Regulations NOHSC: 1007 (2000) - National Standard for Occupational Noise (AUS/NZ) 9001:2008 - ISO. Single Use. One Size. 200 pairs per box