Fit: The most important thing when it comes to wireless earbuds is fit. Because if they don't fit in your ears super securely, it won't matter how good they sound or what other speaker features they have — you won't be able to wear them while you exercise. Most of today's wireless earbuds that are designed for working out have special earhooks or earwings (the latter of which grip the inside of your ears rather than the outside), so they stay in your ears better.
Sweat resistance: You can technically workout with any wireless earbuds, but if they don't have an IPX4 rating or better, there's a good chance your sweat will kill them prematurely. The best wireless earbuds have a high IP rating — IPX7 is the best — so they won't be affected by the excess sweat in your ears.
Sound quality: These are still wireless earbuds, after all, and sound quality is undoubtedly important. If you value higher-quality audio while you work out, the good news is that many high-end audio companies (such as Klipsch, Master & Dynamic and Apple) have released their own wireless earbuds that are primed for workouts. The catch is that you'll have to pay in the $250-to-$300 range to get them.
Compatibility: What type of smartphone you have, be it an iPhone or an Android, should play a big part when buying wireless earbuds. While all wireless earbuds will technically work to connect with your smartphone via Bluetooth, you might not get all the best exclusive features, such as fast pairing and support for different technologies. This is why very few Android users get AirPods, and very few iPhone owners get Google's Pixel Buds or Samsung's Galaxy Buds.
Special features: Wireless earbuds from Apple and Beats from have special chips that allow them to work better with iPhones. Some wireless earbuds have premium features such as active noise-canceling and transparency modes, as well as support wireless charging. The most you're prepared to spend, the most features you'll generally get. But you can still get a solid pair of wireless earbuds for less than $100, even if they aren't as feature-packed.