Garmin Unisex Black Smart Sleep Band With Advanced Sleep Tracking And Recovery Metrics L XL Size Index Sleep Monitor 010 03024 00 Weight_1.45 Pounds a timeless blend of style a timeless blend of style and functionality that stands out with its understated elegance The black dial and bracelet band complement each other perfectly for a fantastic look this lightweight and breathable smart sleep band is available in two sizes for comfort throughout the night the breathing variations feature uses Pulse Ox to check your level of variations while sleeping (this is not a medical device and not intended for diagnosing or monitoring medical conditions