When I was a kid , I used to wear sneakers most of the time and hitch-hiked all over the area with no cold feet problem .
Over the years it changed . My feet get cold . I bought a pair of replacable insoles that have a slot for hand warmers . When it's not real cold , you can put the foam inserts back in the insoles . They seem to help .
I recall this topic being brought up on other sites in the past . It was often suggested to put odorless anti-perspirant on the feet ..........