NOOYME Mens Thermal Underwear Mens Thermals Long Johns

I bought one pair to see how they were and liked them so much I bought another two pairs.

The XL was perfect for me and that’s the same size I use for underwear and t-shirts.
They don’t creep up your leg, you could put socks over them if they did.
Breathable so even on a day when I’m sweating a lot these absorb the sweat.
The only downside is that the bottoms need to be pulled up quite high to have the crotch in the right place but that helps for warmth.