Binary | bi·na·ry | relating to, using, or denoting a system of numerical notation that has 2 rather than 10 as a base

This hat tickles my inner math geek. Counting up from 1 to 21 (10101 in binary) and back down again turns out to be a rather pretty pattern. It also uses up some of the DK partials that always seem to accumulate from the bigger projects.

If you are interested in test knitting this hat, please send me a PM.