Mack's Original Soft Foam Earplugs Mack's Original Soft Foam Earplugs are made with super soft foam, making them perfect for extended wear in situations where comfort is paramount. Mack's Original Soft Foam Earplugs have a Noise Reduction Rating of 29d B, making them great for: Sleep Study Travel Power Tools Shop Noises Work Shooting Loud Events Mack's Original Soft Foam Earplugs are molded with state-of-the-art, super low-pressure urethane foam, slow release comfort foam. Fully skinned & tapered, providing unmatched user comfort & hygiene. User preferred teal color makes them as easy on your eyes as they are on your ears. Directions With clean hands, roll plug into a tight, crease-free cylinder. With opposite h&, reach over head & pull up & back on outer ear to straighten ear canal. Quickly insert earplug well into ear canal & hold in until it expands for a comfortable, secure fit. To remove earplug, remove slowly with twisting motion to gradually break the seal. Rapid removal may damage eardrum. Discard after several uses or as soon as dirt or wax accumulates on earplugs. Caution: Improper fitting will reduce effectiveness & could result in hearing loss or injury.