Some may scoff, but I am looking at heated insoles. It's a confusing landscape of products. I am leaning towards the non-integrated heaters with external batteries. Some of them seem to be rated for as much as 10-12 hours. External batteries allow for change out halfway through a long day. They also have minimal affect on shoe fit and permit any insole to be used. That type of product is pretty expensive though.
There are some cheaper insoles with integrated batteries but power and life seems poor. Probably not suitable for LD service.
Heated socks all look bulky as heck. Might make things worse by making shoes fit too tightly.
Last edited by Steamer; 01-04-22 at 05:46 AM.