These ice cleats- if worn, will most likely keep you from busting your ass. Wearing these I can walk on a downhill slope of solid slick ice with complete confidence. Depending on your shoe profile you may need to order a size up. If it's a normal shoe then normal then normal sizing will work. If it's a big boot or large soled shoe- go a size up.  In normal icy conditions on flat ground other cleats seem to work fine but when the ice is smooth and slick and on a slope and wet- these work great!  It is the cleats on the heel that save me from becoming a victim of gravity.  It really is amazing how hard and fast a person can fall when not wearing these ice cleats.