To go with the acrylic hoodie, I also knitted my Mum an alpaca hooded scarf last Christmas; slightly less easy to care for but more luxurious. The pattern is from the Tracey Ullman and Mel Clark book Knit 2 Together. I've knitted a couple of things from this book now, and haven't come across any mistakes or instructions that are difficult to understand. This pattern is another easy one, and the finished product works well.
Yarn: Berroco Ultra Alpaca, two skeins, one for the scarf and one for the bonnet part.
Needles: US 8 / 5.0 mm for the main part, and US 7 / 4.5 mm for the ribbing
Pattern: Grownup Bonnet by Tracey Ullman and Mel Clark in their book, Knit 2 Together
Modifications: I made the large size of bonnet for wind protection, and also made it all on smaller needles for wind protection.
Dates: Started December 12, 2008; completed December 20, 2008
Ravelry link: http://www.ravelry.com/projects/laurendw/grownup-bonnet