"I've got a 100 foot roll of 550 cord in my bag that i'll cut a piece off of if i need a new lace. There's nothing more miserable then being cold and wet. Cold is bad enough I always tried to carry 2 sets of everything for each day we were going to be out.
We used that pantyhose trick as well to stop blisters. I saw guys have blisters the size of quarters on their heels from not listening to tricks like that. "

"take it from an old grunt. if you are preparing for when the SHTF you need to consider two things; your feet.

keep several pair of footwear on hand. All purpose boots that lace up above the ankle but not beyond mid-calf with a good deep tread. Boots need to be flexible, as light as possible, alternated so all pairs are properly broken in. Try to avoid all leather boots if you do not understand how to maintain the leather properly.

Also consider keeping several pairs of all-synthetic construction cross trainers or cross country shoes. they are good for hiking cross country, fleeing from rampaging hordes, and are easier to swim in during an emergency. the greatest part is that they are very lightweight.

I like my high tech boots. i often back them up with some new balance cross trainers. G.I. speed lace boots are hard to beat for everyday wear, but since they are leather you need to understand how to keep the leather clean and conditioned or they will wear out in a phenomenally short time.

keep pairs of shoes in your bail out bag, backpack, vehicle, every cache, in abundance in you shelters, and so on. replacements will be next ot impossible to come by so be prepared.

also keep foot powder, clean socks (especially poly-wool), shoe laces, toe nail clippers, shoe polish/leather conditioner, and shoe glue in abundance as well.

if you cant reliably run/walk, then you have basically no mobility, and that can turn you into a buffet. "