A year ago, you couldn't get much of a Bluetooth sports headphone for $50. Sure, there were the usual generic brands on Amazon, but anything from a name brand tended to cost a minimum of $80 -- or more.
The JBL Endurance Sprint is a surprisingly good wireless sports headphone for $50, with only a few small downsides.
The JBL Endurance Sprint fits securely and comfortably and sounds very good for a modestly priced Bluetooth sports headphone; It's also fully waterproof and has touch controls.
Touch controls can be a little finicky and there's some presence boost in the treble.