Versatile: Foam earplugs carry 38dB SNR, proficient in blocking loud noises for hearing protection, stopping distractions when sleeping and helping with concentration when studying. Multiple Uses: Recommended applications: studying, sleeping, shooting, flying, concerts, sporting events, fireworks, monster jams, woodworking, vacuuming, mowing, drilling and all noisy environments. INCLUDES CARRYING CASE: This set of noise reduction earplugs comes with a small aluminum case.You can attach it to a key ring or put it in your carry-on luggage. Comfortable During Use: These noise canceling earplugs are made from CE and ANSI approved foam that will not cause pain, pressure or itching. The interior of the earplugs also keeps the ear canal breathable when wearing designed with higher density micro-bubble holes