3M™ Ear Plugs 1100 with storage box are our slow recovery polyurethane foam ear plugs with tapered design. They’re disposable, very lightweight, weighing 13 g, and reduce noise levels by up to 37 dB. For high level hearing protection and all day comfort, use 3M™ Ear Plugs 1100 with storage box. Our soft and exceptionally comfortable ear plugs are made from slow recovery, soft, hypoallergenic polyurethane foam. Their tapered design helps provide a good fit to most ears, and that they’re easy to use and handle. They are easy to roll down and become even softer with body temperature, durability and comfortable. They’re disposable, reduce noise levels by up to 37 dB and can be used in noise exposure range 94 - 105 dB and come in a handy pack of four pairs. 3M™ Disposable Foam Earplugs, made from slow-recovery foam, help provide a combination of comfort and hearing protection for users. Once the foam earplugs are compressed into small cylinders (rolled down), they are easy to insert into ears where the slow recovery foam expands to fit the ear canals. 3M provides a wide range of disposable foam earplugs so you can choose the best solution for your needs.  How to use Fitting Instructions 1. ROLL and compress disposable foam earplugs into a very thin crease-free cylinder. 2. REACH around the head to pull the ear outward and upward to help straighten the ear canal. Insert compressed earplug well into the ear canal. 3. CHECK FIT after inserting earplug. 4.LISTEN to steady loud noise with earplugs in both ears. Cover ears with tightly cupped hands. Noise should sound about the same whether or not ears are covered. CAUTION: For greater comfort and safety, remove earplug slowly with twisting motion to gradually break the seal.