Urbanears Hellas On-Ear Active Wireless Bluetooth Headphones, Trail (4091225) ACTIVE DESIGN : Hellas stay in place and out of the way whether youre running laps or doing an upside-down crunch BLUETOOTH : These headphones are wireless and Bluetooth-ready with up to 14 solid hours of playtime on a single charge SWIPE INTERFACE : The built-in swipe interface lets you cycle through your playlist and pick up calls with a simple swipe and tap WASHABLE FABRIC : Remove the headband and ear cushions after your workout and toss them in the wash