Crazybaby Air 1S are wireless headphones designed for sports, offering uncompromising Hi-Fi sound quality to keep you pumped while you break a sweat. A single headphone of the Crazybaby Air 1S is lighter than a standard sheet of A4 paper, weighing only 4.5g. This light weight lets you break a sweat without being distracted by your headphones. Their comfortable, secure fit and anti-drop design maximizes stability, freeing you to immerse yourself completely in even your toughest workouts. It's time to pump up the jam!