PlugsSafety Zip-outs is a retractable hearing protection system for hardhats that is there when you need it. Tethered earplugs extend over 10-inches for easy insertion into ear canals. Two piece co-molded design uses two different durometers (hardness) to achieve an ultra comfortable fit with a stiff core for ease of insertion. Most comfortable earplug on the market. Triple flange design insures proper fit. Very competively priced. TPU insert provides easy attachment to all PlugsSafety products. Extremely durable TPE allows for extended life of the earplug. NRR 25/SLC8018, Class 3/SNR 29. Corded. Noise reduction rating NRR: 25dB. Metal detectable. Size: universal. Shape: flanged. Plug color: blue/yellow. Plug material: vinyl. Cord color: black. Packaging: Clamshell. Standards: ANSI S3.19-1974. Green environmental attribute: does not contain PVC.