Mack's 9150 Slim Fit Foam Earplugs 50 Pair Purple 31dB

Small-canal fit and 31 dB attenuation

Mack's 9150 Slim Fit earplugs are moulded about 10 % smaller than the brand's standard foam model, making them suitable for narrow or sensitive ear canals. The polyurethane foam expands slowly after insertion to create a seal rated at 31 decibels SNR and NRR. Each pack contains 50 reusable pairs in a safety-sealed jar with a flip-open lid. They are manufactured in the USA and carry a doctor-recommended designation for hearing protection.

Passive noise blocking with no power required

The plugs contain no electronics, batteries or wireless components, so they add zero power draw and produce no self-noise during use. At 45 grams total weight for the 100-piece supply, they impose negligible mass on the user. The foam material is designed for low-pressure expansion, which helps maintain comfort during side sleeping or extended wear in quiet environments.

Consistent attenuation during prolonged exposure

Because the foam relies on physical expansion rather than active circuitry, its 31 dB reduction remains stable for the full duration of concerts, shooting sessions or industrial shifts. Reusability allows the same pair to be worn across multiple days without performance loss, provided the plugs are kept clean and re-inserted correctly. Improper fitting will reduce effectiveness, so following the roll-and-hold method is essential for sustained protection.