To me it makes sense that your foot will slide forward in a wider shoe, and that can cause black toe nails and blisters. The narrow fit definitely works for me. I tried Innov 8, wich is much wider than my Salomons, and for the first time I had blisters on my soles and in between my toes. But like I said before, everything depends on the shape of your feet. I have long narrow feet, I need a shoe that fits securely. Anything more than a 5mm gap on the front and sides and I get toe issues and terrible heel slip.
