Usage Tips:BEST-IN-CLASS HEARING PROTECTION - Our high-fidelity earplugs protect your ears from harmful noise while still allowing you to clearly hear your surroundings. Noise reduction up to 21 dB (NRR 16 dB). QUALITY - Our innovative attenuation filter allows you to hear the world around you at a lower volume. Noise is evenly reduced to maintain a full spectrum of sound while protecting your hearing. ANYWHERE - Great earplugs for concerts, noise sensitivity, tinnitus relief, motorcycles, musicians, drummers, noise reduction, sporting events, sleeping and many more! - Each unit includes two pairs of earplug shells in different sizes made of silicone. Fits most normal to large ear sizes. WATERPROOF ALUMINUM HOUSING - Never struggle with earplugs again with the included sturdy metal housing and waterproof rubber seal. Our compact housing stores safely and easily on your keychain, carabiner, backpack or pocket. Color: As shown Material: Metal+Plastic Package Contents: 1 pair x earplugs 1 x case Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.