The "Otto" (named after the canine mascot of Icebox Knitting, the great Longmont Colorado knit factory that creates our knitted hats) uses the same yarn as our luxurious bison/yak crew sock.
40% American Bison Down, 40% Tibetan Yak and 20% Primaloft (siliconized polyester). It's slightly more grey than our other hats (the yak is almost black and blends well with the bison.
Oh, so soft and light; warm, but not stifling. It has become my go-to hat when the thermometer dips below 32 and my hairless head starts to feel the breeze.
This hat has a great give to it and fits snuggly. The color is not 'mustard' as pictured, it's a light brown but a nice neutral color.