Max® An economical and convenient choice for work situations that demand a high degree of comfort, frequent changes or where hygiene presents a problem for reuse. Highest NRR in single use the world most-used polyurethane foam earplug. Bell shape for maximum in-ear comfort. Contoured design for easy insertion, resists tendency to back out of the ear canal. Polyurethane foam enhances comfort, especially for long-term wear Smooth, soil-resistant skin prevents dirt build-up. Max® USA style in patriotic red, white and blue. Available in paper bag packaging.