100% PVC-Free. Independently tested NRR 27, with a new sound dampening additive. NRR 27 gives protection in most noisy environments. Easy grip handle lets earplugs easily slip into ear. Air bubble in tip provides cushioned comfort. Earplugs can be washed and reused. Pocket-Pak carrying case provides hygienic storage of plugs between uses. Available in corded, uncorded, and corded metal detectable models. The bright green color is a trademark of Moldex-Metric, Inc. and also provides easy compliance checks.