We also talked about it here, where we gave lots of advice on how to dress in winter. The 2 extremities of the body (hands and feet), in some subjects, are very difficult to keep warm without sweating. The sensations felt are numbness and tingling. They are 2 very personal areas of the body: I know people who do cyclocross races in the snow without gloves and people who go out in thermals on a Sunday trip on a beautiful sunny winter day.
Here we must be the ones to choose a warm garment that does not make us sweat: it is often a fine line between well-being and sweat. We don't exaggerate with the heaviness so as not to ruin the riding feeling: in MTB, the thinner the glove, the more sensitivity we have on the grips. The important thing is that the front part has a heavier membrane (being in contact with the wind) while the rear part is thinner for a better grip (the more technical models already have these features).
FEET
There are some ways to keep your feet warm during your MTB rides in winter: use winter shoes, in Gore Tex or other materials, or shoe covers or wear warm socks: merino wool socks (example) can help keep your feet warm. warm and dry feet while cycling (preferable to cotton).
I do not recommend shoe covers because you often walk on MTBs and they risk getting ruined/torn in a short time: there are MTB models that leave the bottom of the foot free, but honestly I would keep it as the last choice if you don't want to get a model of winter shoe.
The goal is to keep your foot warm without making it sweat! If you find yourself in that bad situation where you're cold but can't keep your foot warm without making it sweat, try working on layers, perhaps wearing two pairs of socks: a very thin pair in synthetic fabric, over which you'll wear heavier socks , so as to create a minimum of breathability between the 2 layers.
EXTRA FEET MAKEUP
If you really can't warm up those blessed feet, you can try replacing the insole of your shoe with a heavier model, given that the shoes on sale (usually) are sold with very breathable insoles. This is of course if you don't have a winter shoe model, which is already equipped with a windproof sole.
