Amazon.com : https://www.amazon.com/gp/product/B0015WJQ70?tag=eatingwelldia-20
Etymotic Research ER20 HighFidelity Earplugs White with Beige Stem Discontinued by
Product Description :
Reduces noise while preserving sound quality
Speech is clear not muffled
Ready-fit low cost hearing protection
All sound is reduced evenly by 20 dB
Helps prevent noise-induced hearing loss
