Uncorded, Poly Bag Qty/Box: 200 prs. Vibrant colours make protection visible. Self-adjusting polyurethane foam expands to fit virtually every wearer. Contoured T-shape for easy insertion and wear. Smooth, soil-resistant skin prevents dirt build-up. Attenuation tested in accordance with ANSI S3.19-1974. Ratings: NRR 32 dB, CSA Class AL.