IT IS MADE OF HIGH-GRADE SILICONE MATERIAL, SOFT MATERIALS DO NOT CAUSE PAIN OR DISCOMFORT. AND IT IS WASHABLE, REUSABLE, AND SAFE TO USE, WHICH MEANS THAT YOU CAN USE THEM FOR MANY YEARS. THESE SILICONE EAR PLUGS CAN EASILY BLOCK ALL TYPES OF NOISE. IT IS SUITABLE FOR SLEEPING, SNORING, FLYING DISCOMFORT, TRAVEL, SWIMMING, SURFING, CONCERTS AND LIVE MUSIC, FACTORIES, AND COMMERCIAL AREAS, CONSTRUCTION SITES, MOTORCYCLES, AND IT IS ALSO GREAT FOR MANY OTHER LOUD EVENTS. 1 3/8" L X 1 3/8" W X 11/16" H