Independently tested by a third-party organization. Noise Reduction Rating (NRR): 33dB. - 25 pairs will be sent directly in the packaging case as shown in the second photo. Please specify in the comments before purchasing if you have any issues. - The packaging case is reused and may have tape marks as shown in the photos. - Please feel free to ask any questions or make any requests in the comments before purchasing. - You can purchase immediately without commenting if you have no questions. We will prioritize the person who purchases, even if there are comments in progress. Moldex Goin Green Disposable Earplugs Goin' Green® earplugs are ideal for noisy environments, providing the highest Noise Reduction Rating (NRR) of 33dB. They have a unique appearance with a green marble design, but offer serious protection. Features: 100% PVC-free. Highest NRR of 33 in third-party testing. Made of very soft, low-pressure foam for comfort and a snug fit. Tapered shape for easy insertion and removal. Suitable for those with very small ear canals. Smooth, non-irritating surface finish. Original marble pattern, a symbol of Moldex quality. Earplugs Disposable Earplugs Moldex MOLDEX Sleep Travel Noise Workplace