Leaf Urban Fitness Tracker. NWOT Never worn. bought for a gift, but she ended up buying something different before it was given. Bummer. The Leaf is smart jewelry that looks chic and serves a great function. This beauty monitors sleep, activity, meditation, stress, reproduction health, and has a smart alarm... all while oozing Luke stylish jewelry. Can be worn as a bracelet, necklace, or can simply be clipped on your pocket. Reach your goals with this Leaf.