As in some beret patterns I browsed, I decided to use 3 strands to make the hat thicker.
The actual gauge I made was 19 sts/25 rows per 12x12cm square, this was rounded to 16/21 for a 10cm square.

This hat used up most of the 3 skeins of the Lang Mohair Luxe. I think Wendy Air should work just as well.