Done in double knitting. 4.5mm needles, worsted-weight acrylic yarn. I had to repeat the pattern a little bit to get something of the appropriate length for a headband.
Feel free to use and share the pattern. Make as many Hera-headbands as you want, it’ll be awesome. Make any alterations to the pattern that you feel would make it better, things can always be improved. I only ask that you don’t claim credit for the original pattern itself; and I’d like to see anything you do with it, but it’s not a requirement.
As a bonus, a slightly better photo of the Kanan headband I’d posted about ages ago:
Addendum: if someone doesn’t know what double knitting is, but does know how to do both knit and purl stitches, I can try and explain it. Or you can look up various tutorials; just if you know how to knit and purl, you can do double knitting.