Bitte helfen Sie mir! Wo kann ich in Deutschland günstig langärmlige Thermo-Strickwaren wie diese kaufen?

That’s the kind of stuff that gets offered seasonally at stores like Tchibo or your discounters like Aldi or Lidl. Or you could try an outdoor shop.

Try Uniqlo, Trigema, c&a, just to name a few, where c&a is the cheapest probably.

[is this sort of what you’re looking for? it’s a Canadian company that basically only does this sort of thing. high quality and only €32 on Amazon](https://amzn.eu/d/fC5NE3N)