This pattern is for beginners through intermediate skill level. Row by row instruction for headband with side increases and decreases.

You need to know how to:
Knit
Purl
Make one (M1)
Decrease
Cast on
Bind off

I think the headband looks best using natural fibers. You can use cotton yarn, hemp, linen or a blend of either of these fibers. It could also be knitted using sport weight acrylic or wool yarn.