An optional noise cancelling boom-microphone is available as an accessory

extends the life of the earplugs

providing you do not attempt to remove the ear plug yourself and accidentally push it deeper into the opening

With four sizes (XS - L) to choose from

tested and verified according to: * US standard ANSI S3

Howard Leight Bilsom 304L Large Corded Ear Plugs (SLC80 24dB, Class 4) Amount:50 Pairs An optional noise cancelling boom-microphoneThe right earplug should feel comfortable in the ear canal without compromising protection. With over 30 years of expertise in advanced earplug development, Howard Leightenergises its unique Bilsom 300 series single use earplug for a new experience of in ear fit and increased comfort that your employees deserve. Bilsom 304s unique foam formulation delivers both in ear comfort and visibility with the introduction of the Leight Stripe, a skilled blend