Take outstanding audio for a run. With interchangeable secure fit earpieces, the ATH-SPORT2 SonicSport in-ear headphones are designed to stay in place while jogging, working out or engaging in other sporting activities. The S/M/L earpieces are ergonomically constructed to mirror the hollow of the ear and provide a secure, comfortable fit. Plus, since the headphones don't wrap around the outer ear, they are perfect for those who also like to wear sunglasses while working out. The fit and sound characteristics can be adjusted further through the interchange of two types of eartips: standard silicone eartips (XS/S/M/L) that provide outstanding sound isolation and ridged eartips (S/M/L) that allow some ambient noise for safer use outdoors. The ATH-SPORT2 headphones feature powerful 10 mm drivers and a noise-reducing cable design to deliver clear, detailed and dynamic sound. Angled housings direct cords behind the neck, while the included clothing clip keeps the 3.9 ft. (1.2 m) cable securely and conveniently fastened to clothing so it won't interfere with your movement. The headphones are IPX5 Waterproof Certified, so they can be washed after use.