Jawbone is set to release the Up3, the third iteration of its screen-free wearable fitness tracker. Desgined by Jawbone chief creative officer Yves Béhar, the bracelet has a flexible band and a solid piece up top, where most of the hardware lives. It's meant to be worn 24 hours a day, with water-resistance up to 10 meters and battery life that lasts a week. In addition to continuous heart-rate tracking, various built-in sensors monitor temperature and motion, as well as a measure known as "bioimpedence," which is used to indicate everything from hydration levels to sleep patterns. Available in introductory black and silver colors, the Jawbone Up3 launches in the U.S. later this year.