Skullcandy XTFree Bluetooth Wireless Sweat-Resistant Earbud with Microphone, Lightweight and Secure Fit, 6-Hour Rechargeable Battery, Pureclean Tech to Keep Earbuds Fresh, Black/Swirl MICROSPORT BLUETOOTH: These don't hang heavy around the neck or ears, instead, the Bluetooth functionality is built into a low profile and lightweight earbud that delivers 6 hours of your motivational soundtrack nonstop. PURECLEAN TECH: Don't forget that the more you sweat, the more you stink. That's why our impressive Pureclean Tech is blended into our comfortable silicone ear gels to keep your gear feeling and smelling fresh. SWEAT RESISTANT: It's well known that sweat can slip through the cords and cracks of your gear, causing the quality to deteriorate or even stop working. That's why the XTFree earbuds are sonically welded shut, blocking out sweat, rain, or other types of moisture that would otherwise ruin your gear. SAFETY FIRST: No matter the activity, it's important to stay safe. That's why our proprietary ambient ear gels allow you to hear your music without completely blocking out your surroundings, keeping you aware of what's going on around you whether you're training in the gym or outside. ONBOARD MIC AND REMOTE: Take calls and navigate your playlists on any Bluetooth enabled device with the easy-to-access microphone and remote just below the left earbud. Press the middle button once to answer or end calls and play or pause music.