Bought the ring with the intention of using it at a sleep/period tracker. Ended up just sticking with my Apple Watch. Worn intermittently for 2 months. Great at tracking those two things but my attention span is that of a 4 year old so I lose interest. Light scratches from normal use but nothing that wouldn’t be there from anyone using. Oura Features as listed on website: Built to Last Oura Ring is made of titanium: super strong, non-allergenic, lighter than the average wedding band. Pinpoint Accuracy Oura's research-grade sensors track it all: temperature-trends, heart rate, daily activity and recovery, sleep quality, menstrual cycles, even stress. Always Wearable Water resistant and tough enough to withstand altitude, heat, and cold, Oura tracks your biometrics wherever adventure takes you. Long Battery Life Up to 7 days of battery means you can track your health 24/7 without charging every night.