And his hats have to be black or darkgrey.
I think I found a perfect hat pattern for men on ravelry. It´s the Arden hat. It is a free pattern by Mikka Tokuda-Hall.
The pattern is for two sizes (I´ve knitted the larger one) and comes with written and charted instructions!
Although it looks a bit complicated with all that cables it is really much easier than it looks and works up really fast in worsted/aran weight yarn.
Pattern: Arden hat
Yarn: Rowan Felted Tweed Aran in soot (dark grey). I´ve used about 1.5 skeins
Needles: 4mm DPN
On the pictures the hat is unblocked and I think I´ll leave it like this. It has the perfect size for my husbands head and will keep him warm this winter.