The TDK Life on Record SB40s Smartphone-ready Headphones for Sport were designed to meet the rigors of intense workouts. The flexible ear-hook design was engineered to fit comfortably and securely over your ears, thereby preventing irritation and slipping during runs, cycling sessions or while lifting weights. Carrying an IPX4 rating, the SB40s headphones are resistant to sweat and splashing water.The Integrated Smartphone Remote give you the full control of playlists and calls during workouts; play, pause, skip tracks or answer a phone call all with the touch of a finger. The SB40s Sport Headphone’s distinct two-tone cables clearly differentiate left and right ear buds to avoid the fuss and get on with your workout.