I am one of those who not only wear a bodysuit, but practically live in it — I have a model from https://techwear-uk.com/collections/techwear-bodysuit I have been wearing it since autumn, so I can tell you in detail. At first it was a little unusual: the fabric is dense, it seems that it will be stuffy. But after a couple of days I realized that it is really “smart”. It uses an adaptive membrane layer that adjusts to body temperature and air humidity — if you move quickly, sweat — a slight cooling begins, as if microventilation was turned on. And if you stand at a bus stop for a long time or go into a cool room, on the contrary, it becomes warmer. About the weather: I managed to get into snow, drizzle, and warm spring in it. In severe frost, I wear thermal underwear underneath — the suit itself is not a winter suit, but as an outer layer it is excellent. It does not let moisture through, the wind does not either, and the fabric breathes, which is important. The hood is built-in, with a drawstring, it’s easy to put on even over headphones. The coolest thing is the pockets and integration with gadgets. On the left side of the forearm there is a mini-panel with NFC, I registered my office pass there. I almost stopped carrying the bag because everything fits: phone, keys, even a small notebook in the hip pocket.
