What is Double Hearing Protection and When Would You Need It? Your solution to extremely loud work environments. By Ben ...

By combining a 33 NRR earplug with a 30 NRR ear muff, you're not getting 63 dB of protection, but you are significantly increasing your real-world protection level above what either device could ...

MIGHTY NRR 38 COMBO: Get extra noise-reduction when you combine your NRR 28 gun ear protection muffs with your NRR 33 ear plugs. Together, they provide a staggering NRR 38 decibel defense combo.

NRR: MNT chooses earplugs with a medium and high NRR that can block loud noises in a range of environments. Medical News Today follows a strict product selection and vetting process. Learn more here .

However, a 33 NRR may not be totally necessary for sleep — the measurement is primarily used to gauge ear protection from potentially damaging sounds, such as those from loud machinery or music.