Dunno, I have seen plastic get brittle and break apart when frozen though. The reuseability of the zip-ties would come into question. If the wind blew against your shelter would it give any because of inflexibilty of the zip-ties?. Would this cause your shelter to be more susceptible to wind damage? Would this cause an effect similar to what happens to a cheap tarp tied tightly down to a pickup truck bed after going a hundred miles down the interstate?-- It goes to shreds. I'm just asking these things because I would like to know myself. I would definitely choose paracord if I had to choose between the two just to be safe. But you can always bring both!