I got the idea for a Bicycle Helmet Liner from the Helmet Liner I made for a soldier. For my bike helmet I wanted it thin, so I knit it with the wonderful Alpaca Sox yarn from Classic Elite. 60% Alpaca, 20% Merino Wool, 20% Nylon, 100 grams, 450 Yards. Needles: addi circs 0,1,2 (don't ask...) I modified the pattern for the thinner yarn, which landed me in trouble, since I did not knit a swatch. I ended up doing short rows and improvising right and left. it worked, but I will not be able to repeat it. Next time, (and I will make another), I'll know better! It feels wonderful to knit with and to wear, and you feel very cozy, yet its thin! This yarn will be making more appearances on this blog soon!