ReadyMax patented Ripcord Retractors. Hearing protection that attaches quickly and easily to bump caps, hard hats, etc., with 3M peel and stick adhesive. Durable push button retractors provide positive locking when tethered PermaPlug is extended. Strong coiled spring retracts tethered earplugs quickly and securely for easy access when needed. Designed for worker compliance, FOD reduction and safety. 15 in. nylon tether is 22 lb. test for safety and security. NRR 25db rated PermaPlugs are reusable, recyclable and replaceable.