I have a relatively old pair of Lake MXZ-302's and as part of the insole, the have a layer of what is pretty much bubble wrap. The problem is that all the bubbles are popped/compressed around the ball of my foot. My feet have been getting pretty cold this year and I'm thinking this might be part of the reason.
I noticed that 45NRTH makes a pair of insoles, which I would probably buy if I could get them quickly, but winter is almost over and by the time I get them, it'll probably be over. If I can't find another good replacement, I'll probably get the 45NRTH insoles for next year.
A temporary hack that lasts a month would probably be fine. My first thought was just to cut up a couple of wool socks and layer them as the insole. Does anybody have an ideas of what I should replace them with?