Black Diamond Neve Strap Crampons - $100 - 20oz - Fits sizes 4 - 11.5. Flexible bar that works with trail runners. These suckers most definitely saved me from some serious injuries. You feel like you're Spiderman with these on when walking up a snow bank. There is some minor abrasion, but no rust or any damage. I did trim the strap to fit my size 11 trail runner just fyi.

https://imgur.com/a/XA0Dz