Specifications:Material: siliconeSize: 17mm * 14mmWeight: 60 gFunction: protective plugScope of use: Dustproof and noise-proofThe package includes:A 3 layer gray earplugA storage boxLets Through Lmportant Sounds-as opposed to outright noise cancellation,DONGSHEN filtered filter out out specific frequencies. guarantee that you hear your alarm. no more muffled blocking as with foam plugs.Almost Lnvisible and Perfect Fitting- with double slats which adapt to your ear and block harmful noises effectively. transparent material allows an unobtrusive usage. easy removable due to integrated pulling strap.Exquisite Package-the sleeping ear plugs come with an aluminum-box easy storage, waterproof rubber seal ensures their protection from moisture, dust, and debris. you can hang it on your keychain and carry it around with you wherever you go.