[be] aggressive

being fed up with all the slipping and sliding i do on my walk to work on the snow and ice covered sidewalks, i decided to do something about it.  last saturaday i went to the shoe section of the sporting goods store and explained to the salesman how much i hated the winter and how bad my morning commute was on the icy deathtraps they call sidewalks.

the salesman looked at me and said, "it sounds like you need a more aggressive sole."

i couldn't agree more.