The SMART headband is made with a highly breathable stretch micromesh that transports perspiration and moisture to the outside. The running headband is suitable for any outdoor sport (e.g. trail-running, trekking, walking, etc.) but also for indoor sports (e.g. gym, etc.). Often this running headband is worn instead of a helmet liner, because the thin fabric with which it is made it is not thick and does not constrict. The headband is made with a highly breathable stretch micromesh that transports perspiration and moisture to the outside. The running headband is suitable for any outdoor sport (e.g. trail-running, trekking, walking, etc.) but also for indoor sports (e.g. gym, etc.). Often this running headband is worn instead of a helmet liner, because the thin fabric with which it is made it is not thick and does not constrict. Like many headbands it is available in different colours in a ONE size.