Package Included: 2x Pair of Noise Canceling Ear Plugs 2x Carry Case Specification: Product name:noise cancelingearplugs Model:937617 Material: liquid silicone Color:green+blue Earplug size:2.2x1.5x1.5cm/0.8”x0.6”x0.6” SNR(Signal Noise Ratio):25db Waterproof:yes Application: for concerts, bands, learning, sleep, work Features: -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 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.