Feature: Christmas tree shape reduces pressure on the ear canal, suitable for long wear Suitable for a variety of different ear canal shapes for prolonged sleep without causing ear discomfort Can be used repeatedly without deformation Specification: Product name: Noise canceling ear plugs Material: Silicone Color: Green Earplug size: Approx. 2.2cm x 1.5cm x 1.5cm/0.8/quot;x0.6/quot;x0.6/quot; SNR(Signal Noise Ratio):25db Waterproof: Yes Application: for concerts, bands, learning, sleep, work Wearing method: Pull up the upper part of the ear gently, align the earplug with the ear canal and gently rotate it to a suitable position to ensure that the air in the ear canal does not communicate with the atmosphere. This product can be used repeatedly and cleaned. Package Included: 1 Pair of Noise Canceling Ear Plugs 1 x Carry Case IN Retail Box. Packed Safely in Bubble Bag. All the items will be dispatched within 2 business days after your payment is clear. Note: China Post Air Mail/Parcel just belongs to worldwide post system which is much slower than Special Delivery. Items will arrive in 7-25 business days to worldwide usually. And the arrival time also depends on some factors and different areas. The general arrival time table is shown below for your inference: If the item is defect when you receive it or you are not satisfied with it, please return it within 14 days for a replacement or money back. But the items must be back in factory condition. Please contact us in advance and double check the return address before you return it. If item is defective in 3 months, we could send you a new replacement for free or offer full refund after we receive the defective item. If item is defective in 12 months, we could also offer you replacement service, but you have to pay for the extra shipping expenses. Our aim is to provide Top Level Customer Service, and our customer service specialists are always standing by to solve any of your problem. We greatly appreciate your 5-STAR POSITIVE feedback and please do NOT leave negative feedback without asking for help.