I absolutely love this shoes for Zumba! I already danced 5-6 hrs wearing them and couldn't be happier. They are true to size. I got them in my regular size 7, and wore them with tick athletic socks, and still had enough room in the toe. I wouldn't suggest to go up in size, since they will stretch a bit after multiple wears. I own 2 pairs of Ryka influence, 1 pair of Ryka tenacity and all of them are just perfect for Zumba classes. Somehow, Vida feels much lighter on feet and molds to feet so seamlessly that i feel like not wearing shoes at all. It has a pivot that provides smooth rotations on the wooden floor,  shoes don't slip on the floor, even though, at times studio is quite humid, provides tons of stability at lateral movements. I'm keeping an eye on blue color now. I got Vida in lime with teal color and get tons of complements. These sneakers not just are extremely comfortable but they look absolutely fabulous! Highly recommend them, especially for Zumba.