Thank you for viewing. These are earplugs designed to help with pressure changes. Brand new, unopened. 【Product Features】 These earplugs reduce discomfort in the eardrums and ears caused by pressure changes, such as those experienced on airplanes. - Size: Diameter 11mm x Length 27mm - Quantity: 1 pair (2 pieces) - Features: Pressure adjustment function I have not personally used this product, but I have used other earplugs designed for pressure changes. The effectiveness of this type of earplug may vary from person to person. Please understand this before purchasing. Shipping will be via Yu-Packet Post Mini. * Simple packaging will be used. Please refrain from purchasing if you need to know the exact delivery date. Price is not negotiable. Free shipping. Thank you.