compared to other flange earplugs which are designed primarily to block out noise

SLC80 27dB (Class 5)

And since they're available in three sizes

Mack's Flightguard ear plugs are designed for comfort

Box - Uvex Hi-Com Fawn Disposable Uncorded Earplugs (200 Pairs | SLC80 16 dB, Class 2) NRR_22 compared to other flange earplugsThe innovative shape of the uvex hi com earplugs reduces the level of sound that normally builds up in the inner ear when wearing hearing protection. Integrated cavities result in a larger surface area in the direction of the eardrum. The earplugs provide softer acoustics and absorb disruptive noises which allow excellent speech perception. Features Earplugs with low sound absorption and excellent speech perception Fawn coloured SLC80: 16 dB, class 2