EP8 Sonic Defenders Cobalt earplugs protect your hearing without interfering with your ability to hear routine sounds or conversations. Constructed of a proprietary metal-infused polymer that’s detectable by industrial scanners, EP8s are bright blue in color and feature permanently attached lanyards, making them ideal for use in food and pharmaceutical processing and similar industries. Their patented Ear Lock by SureFire design "locks" the earplugs in place, while soft, adjustable double-flanged stems provide a secure seal in the ear canal. Right/Left color-coded EP8 Sonic Defenders Cobalt are made from a soft but durable hypoallergenic polymer and are ergonomically shaped, providing a secure fit, all-day comfort, and an extended product life of up to 6+ months, depending on usage and care. Their low-profile design means EP8s can be worn while wearing a helmet or mask or while using a phone or headset.