Toe warmers for the feet.
https://www.rei.com/product/158982/p...SABEgIvH_D_BwE
And felt insulated foot beds in the shoes.
https://www.zoro.com/little-hotties-...SABEgKbZfD_BwE
A few days ago temps were in the low 30s F but I was well dressed and completely warm the length of the ride. Today was in the mid to low 50s F and I was under dressed and cold, no so fun. It also helps to be young. I remember being 18 y.o. and invulnerable and going out for the evening in flip flops with 5" of snow on the ground.