Turban headbands are so comfy. I've made some out of jersey fabric and some out of old t-shirts.
1. Measure your head. Mine was 21". I cut two strips that were 20" since the fabric stretches.
2. Lay the strips over one another like a cross.
3. Fold the strips in half and twist.
4. With a needle and thread, whip stitch the ends together.