I used these shoes for a game and a half. The left shoe didn't slip, except with the powder that had to be applied every frame. I had to borrow the left shoe to finish the second and third games. I've tried sandpaper, stone block and wire brush but to no avail. I was afraid of falling every time I threw the ball because my left foot got stuck. I love the shoes for their comfort, weight and looks, but they don't bother me in my closet at home. I will not recommend this shoe to anyone.