And they’re reversible, too!

Editor’s note, May 12, 2026: The Brooks Ghost 18 is out now. The trainer is our Best Overall for beginners. The Ghost 17 is now 20-percent off. Instead of getting lost in shoe tech and becoming ...

Have you ever noticed white marks accumulating on your skin, clothing or headwear after you’ve been out running? These are basically thin layers of salt, a substance – essentially electrolytes – that ...