Recently met some fishermen who were not familiar with the bottom of my wader boots. 1/2 inch felt soles with 3/8 inch sheet metal screws in them. Gives you the best of both worlds—the non-skid of felt plus the bite of steel cleats. Very rarely have these let me down over the years and I’m a very aggressive wader. I’ve fallen in some of the best Steelhead and Atlantic Salmon Rivers!