>>775553>>775627The body produces heat and loses heat. Clothing is meant to reduce that loss. Sure your body will eventually restrict blood flow to preserve core temperature, but that means cold hands which is neither comfortable nor practical if you want to do anything with them.
Also, there's a very good reason to wear a t-shirt instead of a long baselayer: it's less warm. If I wear t-shirt and wristwarmers I can adjust part of the warmth without changing layers (dropping the rucksack/shell etc.). Of course there are shirts that allow rolling up the fabric at the elbow, but that becomes uncomfortable quickly. For example, t-shirt+longsleeve+wristwarmers means I can go from bare wrists (longsleeve rolled up at the elbow) to double covered wrists and half-gloves while moving. You with two longsleeves would have only half the adjustment capability and possibly still need gloves.
Also, there are leg warmers (I got some swedish army surplus), they are easier to don and drop than long johns (notice a pattern there) but I mostly find adjusting tops to be sufficient.
You really sound like a massively close minded idiot who dismisses whatever doesn't fit his preconceived notion. People who spent their life outside to work, fight and survive wore these. They had a very good reason for that.
