Incredible Sound Loved by 20 Million+ People Rotate, Set, Go: Twist the 210° rotatable ear hooks until you find the perfect spot for you. The unique design keeps Sport X10 workout earbuds comfortably and securely in place throughout your workout. Exercise-Proof Buds: Sport X10 workout earbuds have a fully-waterproof, IPX7-rated build that stops liquids in their tracks. For further protection, our exclusive SweatGuard technology defends against the corrosive properties of sweat. Hardcore Beats for Maximum Motivation: The dynamic acoustic system delivers 2× more bass while preserving the clarity of mids and treble. BassUp technology analyzes and enhances your music's bass in real-time for an extra boost. Up to 32 Hours Playtime: Get 8 hours of music from a single charge of the workout earbuds and add an extra 3 full recharges via the charging case.