Headphones is the loose title given to in-ear, on-ear, and over-ear models. In-ear or in-canal versions are known as earbuds or earphones, whereas on-ear and over-ear versions are headphones. And then there are bone conduction or open-ear models that transmit vibrations into your cheekbones instead of your ears.

With so many models to choose from, here’s what you should look for when choosing the best headphones for working out.

Sound Quality

Sound quality is the most important factor when choosing the best workout headphones. If the sound is lackluster, you may as well just whistle or hum. According to Corey Lewis, former football player and CEO and founder of 1And1 Life, the sound quality sets the tone for any workout. “Clear, dynamic, and incredibly detailed audio quality is what you’ll want to bring your music or audio to life while you exercise,” he tells us.