Index Sleep Monitor Size:L/XL Elastic waistband with internal drawcords

Elastic waistband with internal drawcords for customized comfort

combining signature colours with a pinstripe design in way that embodies the essence of Borussia Dortmund

Responsive TPU plate to start

Built with dryCELL to keep you dry and two secure pockets for your essentials

Index Sleep Monitor Size:L/XL Elastic waistband with internal drawcordsTHE MOST COMFORTABLE SLEEP YOUVE EVER TRACKED For a more comprehensive view of your fitness and recovery, the Index Sleep Monitor is the lightweight smart band that tracks your sleep1 while maximising comfort. COMFORTABLE, BREATHABLE DESIGN WORN ON THE UPPER ARM UP TO 7 NIGHTS OF BATTERY LIFE SLEEP TRACKING AND RECOVERY METRICS BREATHING VARIATIONS THROUGHOUT THE NIGHT SKIN TEMPERATURE TRACKING FOR PAST OVULATION ESTIMATES AND MORE MACHINE WASHABLE