Damping system absorbs noise for a purer music experienceSound waves produced in headphones reflect back onto the diaphragm, compromising sound quality. By absorbing unwanted, reflected waves, the damping system enhances your music by delivering a clearer sound. Durable break resistant Kevlar fiber cableThe Mi In Ear Headphones have cables covered with TPE and made of Kevlar fibers the same kinds used in bulletproof vests. The Good quality cables feature enhanced strength and resistance to breaking and kinking. Its smooth surface resists tangling.