These are the best!! I am a restaurant manager. The first time I wore them I was on my feet for over twelve hours and had almost no slippage.  Every time since... None at all.  You CANNOT see them with my flats!  I have to wear closed-toed non-slip shoes.  I finally found professional looking wedges and now I can go without hose this summer because if these amazing no-shows!  Highly recommend!!