Macks Acoustic Foam Earplugs (7pr). Protect your ears while still enjoying the sound of life. With a hollow-cut, grooved design, these earplugs deliver clearer acoustics and allow for improved communication—because hearing is important, but hearing right is even better. Whether you're at a concert, jamming with friends, or working on a project, these comfy, safe earplugs are your perfect noise-blocking sidekick. With a Noise Reduction Rating of 20 decibels, Macks are the #1 doctor-recommended brand for protecting your hearing without missing a beat.