Howard Leight by Honeywell Earplugs, Multi-Use, Series: Fusion, Corded Design Type, 25 dB Noise Reduction, 4-Flange Shape, S Size, Blue Plug, Thermoplastic Elastomer Plug, Blue Cord, Vinyl Cord, Specifications Met: ANSI S3.19-1974, Reusable.Fusion detectable multiple use earplugs use advanced manufacturing technology to deliver a revolutionary combination of all day comfort and easy handling. Its FlexiFirm core ensures easy insertion into the ear canal and a superior fit all day long. Fusion patented SoftFlange design adjusts perfectly to the ear canal to deliver unmatched comfort and superior attenuation. 2 sizes large and small provide optimal fit for comfort and safety, while the attached cord and metal stem ring allow earplug detection for process industries.