Knitted in England from pure 100% British wool really fits the bill. I think it would keep me warm in just about the harshed of Germany weather. Cut long and fairly close fitting help a lot with the job at hand. From the Good people at Atlantic Shore knitwear located in Saint Ives, Cornwall they have been making traditional hardwearing English knitwear since 1984. If you happen to find your self in St. Ives you really should drop into there shop, otherwise, do as I did and order yours on their website.
According to their website Atlantic Shore Knitwear supplied a quantity of this jumper recently to the wardrobe department of 20th Century Fox in Hollywood for their new film 'Call of The Wild' Starring Harrison Ford and Dan Stevens, due for release in 2019. I'm not sure if these will be used as costumes for the movie or to keep the crew warm during the location filming in the Yukon, but either way, they'll be plenty warm.
I like to combine my with my duffle coat from John Partridge Co. which together will keep me toasty warm in the harshest of weather.