MOS Reference: Reusable triple-flange silicone ear plugs with attached PVC cord to prevent loss during active work. Pre-molded flanges provide a consistent NRR 25dB noise reduction without the need for roll-down insertion. Cord allows plugs to hang around the neck when not in use and can be detached if preferred. Washable with mild soap and water for extended service life. Carrying case included for hygienic storage between uses. Cost-effective alternative to disposable foam plugs for daily noise exposure.