Comply - Truly Wireless Pro Premium Earphone Tips - Black Brand New, Factory Sealed Features Compatible with most in-ear wireless headphones For use with your existing pair. Secure in-ear fit Memory foam expands to fill the unique shape of your ear canal, creating a custom snug fit to dramatically increase in-ear retention. External noise blocking Engineered to create a custom ear canal seal to block out outside noise and environmental distractions. Enhanced audio The perfect ear canal seal helps Complytips funnel pure sound directly into your ear. Soft comfort Body heat activated memory foam provides ultra-soft and comfortable listening experience. SweatGuardprotection The acoustically transparent filter blocks all sweat and moisture from entering the earphone. SmartCore The patent-pending core design provides easy installing and wide range of compatibility with truly wireless earphones. Standard size Fits most users.