These are thermals that don’t look like thermals. They are really comfortable, breathable and easy to layer, or to wear on their own as a tracksuit. On a ski trip I wore these in minus 8°C with just a T-shirt under my ski jacket and felt fine.
The stretchy bottoms were great for loafing around in at the chalet after. The Thermogrid mid layers dry quickly, they look good (i.e. not like traditional thermals) and are a great fit. Highly recommended.