Tiny but mighty. The earplugs combines full-bodied sound with convenient lightweight portability and effortless style. Best used with MP3 and music players, the creates resonant sound enhanced by proprietary Pro Bass technology. Rich, full-bodied sound enhanced by proprietary Pro Bass technology. Three sizes of soft interchangeable ear plugs for custom-fit comfort. Durable, compact & lightweight for listeners on the move. Perfect for all MP3 and music players. Jetset-enabled travel adaptor for in-flight usage. Stylish compartmentalized travel pouch.