Mack’S Hi-Viz Earplugs’ Bright Color (Ansi Fluorescent Yellow-Green) Is The Most Visible Color To The Human Eye Making Them The Superior Solution For: 1. Compliance Checks (Monitoring Employees Working In Loud Environments): Utilizing The Most Luminous Color, Mack’S Hi-Viz Earplugs Allow For Faster, More Efficient, And More Accurate Compliance Checks, Especially At Greater Distances And Under Different Light And Weather Conditions. 2. Fast Acquisition For Critical Use: Mack’S Hi-Viz Earplugs Give Users The Best Chance To Quickly Visually Locate For Immediate Use When Under Unexpected Or Sudden Unsafe Noise Conditions. 3. Finding If Dropped Or Lost: Superior Luminescence Makes Mack’S Hi-Viz Earplugs Easier To Locate. Utilizing The Brightest Color To The Human Eye Gives Users The Best Chance Of Finding Earplugs If Lost Or Dropped; A Critical Feature In Food And Healthcare Manufacturing. *Meets American National Standards Institute’S Highest Luminescent Factor Requirement Of 70% For Hi-Viz Safety Apparel According To Ansi, There Are No Alternative Colors As Luminous As Fluorescent Yellow-Green. Mack’S Hi-Viz Earplugs Are The Most Visible Color Available. Made With Super Soft Foam, These Ear Plugs Are Perfect For Extended Wear In Situations Where Extreme Comfort Is Paramount Great For Shop Work, Power Tools, Industrial Use, Motor Sports, Shooting, Etc. #1 Doctor Recommended Brand To Prevent Hearing Loss Noise Reduction Rating (Nrr) – 32 Decibels