Great (light) winter shorts. It's hard to find bib shorts for colder days, that are a little bit padded. I really like those, as I totally don't like long bibs in the winter, as I fell them to be uncomfy and too tight. I rather like "winter" bibs with 1 or 2 layers of tights instead which gives you a better flexibility.
I would use this short between about -3º-12ºC. If colder, then I would need another layer or a shorter (~1h) ride. Also, Decathlon seems to be doing sales of those shorts sometimes, so I think, I got those for about 40-50 EUR.