1, Christmas Tree Type Earplug with String 2, Reduce noise 3, Silicon 4, For safety, protect, traveling, air using Christmas Tree Type Earplug ... are details of our products for your reference:1. Type: Different choice of Chirstmas tree type, bullet type, mushroom type.2. ... Material: Silicon.3. Christmas Tree Type Silicon Earplug slow rebound earplug.4, With cord or ...