[coreyschucky]

Forget about a heel grip. Heel grips just fill up space and they don't make the shoes fit better. Try a half pad in the front of the shoe and it'll slide you foot to the back. As for the slipping there are all sorts of pads for the soles of the shoes out there. I can't remember off-hand the name of the one we use in our stores but it's a half pad for the sole.