Convenient, metal detectable, corded earplugs are the ideal choice for the food processing industry where retention and detection are crucial. Made from soft, hypoallergenic polyurethane foam that is both comfortable and functional. Boardwalk™ earplugs feature bright blue plugs and cord with a metal ball securely embedded in each plug for easy metal detection. Thoughtfully designed for long-term wear and everyday use. Corded/Cordless: Corded; Shape: Tapered; Material(s): Polyurethane Foam; Encased Metal Ball; Noise Reduction Rate (NRR): 32 dB.