?Dongshen Quality Guarantee-we are committed to 100% customer satisfaction. If you have any questions about the DONGSHEN ear plugs, please contact our customer service. we will contact you within 24 hours. ?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. ?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. ?Perfect Fit and Highest Quality-with a pair of standard-sized earplugs(with filters inside) and a pair of small-sized shells.anti bacteria silica gel structure, super soft and comfortable; won't cause itching or pressure pain. suitable for prolonged ear wear. ?Lets 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.