This is my first purchase and I think I've found the socks I've been lookiing for! They feel great, fit great and really do stay up! The black pair is the only pair of the four I bought that slip down as I walk as they don't seem to have the same grip feature in the heel as the others. Other than that I have nothing but great things to say about these socks and I'll be buying more, just not the black/blue color. Maybe the Aspire doesn't have that feature but since I needed a black pair I thought I'd give them a try. I'll continue to use them in my weight workouts, but not when I go walking.