This shoe is more comfortable than my previous pair of Ryka's which were Studio D Low. Those are lightweight, but kind of narrow and tight, and they felt too slick for Kickboxing. I couldn't wear them for that without feeling as though I could slip and fall at any move. These shoes have some grip, but are still smooth enough for Zumba. They are meshy, not mostly the fake plastic of the Studio D's, so there is "give." There is plenty of room to stretch your toes, and if you have a very narrow foot, these may feel too large for you in that area. I have to tighten the laces every time I put them on, and loosen them every time I take them off. So that takes a bit longer. I wish these came in gray. I got the black. I normally wear a 6M in regular shoes, and I always get a 6.5 M in athletic shoes. Rykas run small, and my other Rykas were 7M, so that's what I ordered in these, and they fit fine.