Principle of foam noise-canceling earplugs is to utilize the density and structure of the foam material to absorb and block external sounds. These earplugs are made of soft polyurethane foam with an open-cell structure, allowing them to expand when inserted into the ear canal, filling it and sealing the surrounding space. As external sounds pass through the earplugs, the foam absorbs the sound waves and converts them into tiny amounts of heat, thereby reducing the propagation of sound. It takes about 45 seconds for the foam to spring back to its original shape. Their cushy feel is non-irritating the delicate skin of your ear canal. You never know what to expect about nighttime noise if you’re traveling. With the MDOG Ear Plugs, you can travel with confidence.
*Notice
Please keep this product out of the reach of children. Avoid accidental ingestion by children.