Feature:1. Unique Design: 3 layer umbrella shaped structure, which can attenuate the impact of sound waves on the eardrum three times, greatly reduce noise and improve sleep quality.2. Water Proof: Can also be used as swimming earplug, which has good water repellency, can be reused after washing and drying.3. Ear Safety: Made from anti allergy silicone material, extremely soft and comfortable, light weight, suitable for long term wear.4. Storage Box: Equipped with independent storage box, convenient to carry, designed with holes, keep earplug ventilated and dry after washing.5. Multi Purpose: Fully fit design, suitable for people with different ear canal sizes, let you focus on learning or work to improve efficiency.Specification:Item Type: Sleeping Ear PlugsMaterial: SiliconeUse: Silicone EarplugColor: GreenSize:Ear Plug: Approx. 2x1.6cm/0.8x0.63inEar Plug Box: Approx. 6x1.5cm/2.4x0.59in.Package List:3 Pairs x Sleeping Ear Plugs2 x Silicone Storage Box