Hi, sorry for the double post. I have a problem with heel slippage and I have tryed several types of running shoes. I have narrow feet and have tryed everything. I am acually running in NB 991 in a size 13 2A. Even these narrow shoes cause slippage and I have to tie them so hard that my foot sometimes goes to sleep. Is there anything else I can try? I have tried all forms of lacing. The only technique that has worked for me somewhat is putting the lace in from the outside in on the last holes. This seems to creat enough friction to lock the laces. It lets me isolate the pressure on just the top of my foot.