Howard Leight by Honeywell SmartFit Detectable Corded Earplugs with blue nylon cord feature a patented conforming material technology that makes use of the body temperature to conform to each ear canal. It simplifies inventory control and provides superior comfort. The bright blue color cord offers high visibility and can be used in food processing, pulp and paper, tobacco and lumber/wood products. The noise reduction is rated at 25 dB and the metal ring on the stem can be detected by automated equipment. The plugs come in a poly bag.