I have a pair of Merrell Women's Bare Access Arc 2 Sneakers in size 9 1/2 and have loved them. I recently found I needed to use a lift in my right shoe and it made my shoe on my right foot feel a bit tight so I thought I would try a size 10. Unfortunately, my heel kept slipping out of both shoes so I had to return it and continue to use my size 9 1/2 shoes. I do Zumba and these shoes are perfect for me. Running shoes give support for forward and backward motion but not so much for side to side motion. Zumba involves lots of side to side motion as we are constantly changing direction from left to right as we dance so side to side support is needed. My right shoe still feels a bit small because of the lift but I will keep using my Merrells because they supply the support that I need to dance.