Product details 3m 1100 foam earplugs hypoallergenic foam, Feature soft and a tapered design to fit comfortably in the earcanal. Key features 1 smooth, Dirt resistant surface for hygiene 2 comfortable across a diverse selection of earcanal sizes 3 test compatible with 3m e, A, Rfit validation system 4 slc80 21db class 3 . Applications the 3m 1100 earplugs an excellent choice for high noise exposure levels, And are ideally suited to provide protection against all noise frequencies across a diverse selection of industrial workplace and leisure environment. Examples of typical applications include automotive chemical & pharmaceutical manufacture construction heavy engineering metal processing textile manufacture woodworking