Ron, My feet are always the first to go!
This is what I do; Spray my feet with unscented antiperspirant, blocks the sweat gland pores and keeps the tootsies dry. Then liner socks, wool socks and Schnee's warmest pac boot.
And my feet still get cold on stand, which is what I used to do,stand, I rarely sat down. Then last year I realized that by standing on my feet constantly, I was putting a lot of pressure on them and I think it must slow the circulation. Now I try to sit more, take the pressure off and wiggle those toes.