Libratone TRACK Air+ Weighing only 5.6 grams, the Libratone TRACK Air+ (£170) are some of the lightest headphones on the market, and therefore perfect for working out. They're also completely wireless, have six hours of battery time, plus they're sweat and splash proof. Image Source: amazon.co.uk Libratone TRACK Air+ £170 from amazon.co.uk Buy Now