Leaf Urban | Rose GoldLeaf is a sleep, activity, and reproductive health tracker that also monitors your resistance to stress and helps you unwind through built in meditations and breathing exercises. Leaf is optimized for womens health, and with its unique, fashion forward design it looks perfect with any outfit. The clip is made out of hypoallergenic stainless steel and rests on a wood composite casing. It comes with a 6 month battery life, and a replaceable battery.