1. 3 LAYER: The earplugs adopt a three layer umbrella shaped design, which can attenuate the impact of sound waves on the eardrum three times. 2. WITH FILTER: An acoustic filter (diaphragm) is added at the bottom of the earplugs, which can effectively reduce various high audio noise in the background environment while retaining soft sound quality. 3. CLOSE FITTING: The three layer head of the earplugs, from small to large, can better fit the ear canal of the user. 4. LIQUID SILICONE: The earplug head is made of liquid silicone that is soft and elastic, without swelling or pain in people ear canal, suitable for use by various people. 5. EASY CARRYING: The earplugs are super comfortable to wear, and comes with aluminum bottle and hanging buckle, making it easy to carry. Spec: Item Type: Ear Plugs Material: Liquid Silicone and Filter Size: Approx. 16x20mm 0.6x0.8in PackageList: 1 x Aluminum Bottle 1 x Hanging Buckle 2 x Transparent Ear Plugs or 1 x Aluminum Bottle 1 x Hanging Buckle 2 x Black Ear Plugs3 LAYER: The earplugs adopt a three layer umbrella shaped design, which can attenuate the impact of sound waves on the eardrum three times. CLOSE FITTING: The three layer head of the earplugs, from small to large, can better fit the ear canal of the user. WITH FILTER: An acoustic filter (diaphragm) is added at the bottom of the earplugs, which can effectively reduce various high audio noise in the background environment while retaining soft sound quality. LIQUID SILICONE: The earplug head is made of liquid silicone that is soft and elastic, without swelling or pain in people ear canal, suitable for use by various people. EASY CARRYING: The earplugs are super comfortable to wear, and comes with aluminum bottle and hanging buckle, making it easy to carry.