As a letter carrier I've tried all kinds of ice cleats and the ones we're issued by the Post Office (they have 1/8 inch long carbide spikes) are good for most slippery days, but on days like today (a 1/2 inch layer of ice everywhere) well, that's when I put on these bad boys;
http://www.kahtoola.com/microspikes.html
They picture them on runners which I think would get uncomfortable, and say they're good on concrete (which is uncomfortable even with boots on and wears the spikes down fast) but they're awesome on thick ice! I can even see myself carrying them in the pack for those stream crossings using wet logs in the summer.
Murray
http://www.kahtoola.com/microspikes.html
They picture them on runners which I think would get uncomfortable, and say they're good on concrete (which is uncomfortable even with boots on and wears the spikes down fast) but they're awesome on thick ice! I can even see myself carrying them in the pack for those stream crossings using wet logs in the summer.
Murray