The German version of the pattern is available through the link below, the English version is available as ravelry download.

This bag has a good size to carry your shopping with you or it can be an ideal bag for a knitting project. Required techniques are knitting in the round, stranded knitting, short rows and double knitting - some knitting experience is advised.

Any feltable wool will work for this pattern, a good substitute should be Cascade 200, used double.