Blue Soft Silicone Swimming Mushroom Ear Plug Waterproof Siwm Earplug Material: silicone Silicone earplug can prevent water from entering the ear canal and ear menbrane. It's not suitable for diving. For children, please use under adult guide Earplug size: 2cm in length / 0.8 inch Package includes: 1 x Pair Ear Plug