Yarn: Patons North America Classic Wool Worsted
Needles: size 7 dpns
Pattern: standard watch cap, same as here, I just increased the cast on to 96 stitches to accommodate male heads.
But then there was the problem of telling them apart. Fortunately, I had been avid to try Techknitter's trick of adding a pinstripe to ribbing after the knitting was done, and viola! It looks quite snazzy on, with the pinstripe coming up off to one side. And the reverse pinstripe from where the brim is folded up, barely visible in the photo, is a lovely small row of blue dots, amazingly cool for the back side of color work. Even though this was a K2, P2 rib, I just picked one of the rib columns to follow, and it worked out fine.
The plan is to add polar fleece bands at some point, since straight-up wool is tough on the forehead, but the streets are not yet plowed enough for shopping.