The winter wardrobe is a deluge of natural, comfortable materials and layered pieces. It also allows for more stylistic experimentation, since more clothes are worn.
Let's go back together on the great principle of building a winter look, before lingering on each piece that makes it up. Without forgetting the selection of brands.
THE BASIC FUNCTIONAL PRINCIPLE: THE 3 LAYERS RULE
To insulate oneself well against the cold, one must first understand a basic principle that hikers know well: the rule of 3 layers of clothing.
a windproof and/or waterproof layer: it blocks wind and rain,
an insulating layer: it contains a lot of air heated by your body, so it insulates you,
a base layer: close to the body, it keeps you warm, avoids the contact of the sweater which scratches and wicks away moisture.
Another basic rule: NEVER get wet.
Neither from the outside (rain), nor from the inside (perspiration), because a wet garment evacuates heat and will cool you down at high speed! This is particularly vicious with feet, where the temperature difference with an icy sidewalk can cause highly unpleasant condensation.
THE BASE LAYER
This is your underwear: t-shirt and underwear.
If you don't plan to be physically active, cotton can do the trick to keep warm close to the body and wick away moderate moisture. Also note that linen, even in winter, performs this function wonderfully.
But if it's for skiing or walking, or if you're going to take the transports in a casual look 1, then prefer a merino wool T-shirt that doesn't get wet as easily as cotton. Or just get into the habit of wearing your coat by hand when you're pressing in the subway halls!