The Moldex SparkPlugs M6644 is the highest independently tested NRR available. Their random fun-colors are a great way to put some spark in your hearing protection program. They're the perfect way to let your employees show their love for NASCAR racing. Their extra-soft, extra-light foam and tapered design seal performs without pressure, while the outer surface is smooth, so it doesn't irritate the ear canal. Bright, fun colors provide easy compliance checks and are 100% PVC-free. With the Ear Plug Dispenser Plug station, you can afford to put earplugs in all the places they're needed. Available in 250 and 500 pairs per dispenser, Plug Stations increase compliance thanks to their high visibility construction. Earplugs are colored bright orange, purple and green.