Most workout headphones seal off your ears entirely, which is fine until you’re running outside and can’t hear a car coming. That’s the problem bone conduction headphones solve, and the SHOKZ OpenRun deal on Amazon right now makes them a lot easier to justify. They’re currently down to $89.94, which is 31% off the usual $129.95 list price. The OpenRun sits against your cheekbones rather than inside your ears, sending sound through vibration instead of through your eardrums. Your ears stay completely open, so you can still hear traffic, other people, and whatever else is happening around you. It’s a different experience from traditional headphones, but runners and cyclists tend to love it for exactly that reason. Specs-wise, you get 8 hours of battery life plus a 5-minute quick charge that adds 1.5 hours when you’re in a hurry. The IP67 waterproof rating means sweat and rain aren’t a concern. Bluetooth 5.1 handles the connection, and a built-in mic covers calls.…