SNR 24 dB(A). Low attenuation reduces the risk of over protection and feelings on isolation, Detectable disposable foam ear plug. Metal powder in cord for full detection even if the cord is shredded. Coloured blue for easy recognition, Unique shape is designed to fit the natural shape of the ear canal helping to reduce pressure for a more comfortable wear, Large surface area delivers softer acoustics and absorbs inner ear sounds which can become obvious when wearing hearing protection in quieter areas, The hollow nose and base gives low and flat attenuation allowing for excellent speech and sound recognitionThe Uvex Hi-Com corded disposable earplugs are blue in colour and feature a metal component to allow for traceability by sight or metal detector for improved security against product contamination. The fluted design gives 15% more surface area than standard tapered plugs, delivering softer acoustics and absorbing noise interference, making it possible to understand speech clearly.EN 352-2 SNR 24 H-26 M 20 L-18