Hi, Cara. Ones with good arch support and support for the balls of your feet. It's also important to know your foot type since everyone has a different one. Playing tennis, I need shoes that will help me with my balance. So that's another thing to consider and oh, yeah, go to a reputable store. Every salesperson doesn't know what the heck they are doing other than wearing the uniform and shop in the evening. Our feet swell as the day progresses, so this is a good time to get a shoe with a perfect fit. Hope this helps. Keep swinging at those balls and happy harvest.