Value Pack: you receive 100 pairs of ear plugs in plastic cases, which you can use in your , share with your family and friends, or buy for your colleagues and classmates, enough quantity to meet your needs and replacements. Good Sound Insulation: these sound blocking earplugs are made of quality silicone, soft and waterproof, good sound insulation, the earplugs are designed in the shape of a Christmas tree, which fits the ear canal better and can attenuate the impact of sound waves on the ears many times, with a signal to noise ratio of 29dB. Reusable Design: these soft silicone earplugs can be washed repeatedly and applied many times, try to wash them with alkaline soap and warm water, and proper storage can effectively extend the use period. Portable Design: each pair of ear plugs for sleeping noise cancelling comes with a clear plastic box to store the earplugs, the earplug measures about 1.2 x 0.5 inches, very compact and easy to carry. Wide Range of Application: these earplugs provide maximum noise cancellation, allowing you to enjoy the peace and quiet you deserve while you sleep, study, or work; They are suitable for protecting your hearing from harmful noises such as concerts, music festivals, nightclubs, loud bars, construction sites and other noisy places. Color:Black Material:Silicone Package Contents: 100 Pairs * Ear Plugs Bulk 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.