The WHOOP 4.0 Health and Fitness Tracker is a wearable coach that keeps track of everything from your sleep patterns to your exercise habits to not just track what you did, but to tell you what to do next. The WHOOP 4.0 coaches you through your day with recommendations based on your unique physiology, whether that's recommending when to go to bed or how much exertion you should take on to meet your fitness goals. Purchase includes an initial 12-month WHOOP membership, WHOOP 4.0 hardware, onyx SuperKnit band, and a wearable + waterproof* battery pack. WHOOP also comes with 24/7 customer service and a warranty in order to make it a worry-free purchase. At the end of your 12 months, you can renew your membership via the WHOOP app to continue use. For first time WHOOP members only. Do you have an FSA/HSA? Take advantage and save on your 12-month WHOOP membership. Just purchase the WHOOP 12-month subscription with your credit card and submit a reimbursement through your FSA/HSA provider. See how to file a claim/submit a reimbursement at https://www.fsafeds.com/file.