I found 'Fab Feet non-skid tread' stick-ons for soles at Target for only $2.99 for a 2 pack and they work wonderfully! I put them on a very slippery pair of boots and it made a world of difference...I also cut down a piece to put on the heel bottom too. I think I saw them at Amazon and Zappos, along with drugstores. Just wanted to tell anyone interested how well they work!