I work mainly in silk, but the colors available to me for that didn't work with the bride's chosen colors. After researching a bit, I decided to go with a 2/18 super fine merino wool that came in sage and navy. I don't work a lot with 100% wool (though I've recently bought a decent amount of it), so this was a new-to-me fiber to weave with. It was an adventure! Wool doesn't break like linen does under higher tension, but it felts (which I expected) and stretches a lot! That did cause a few breaks that I needed to deal with during the course of the project.
Originally the bride wanted two solid color bands, one sage green and one navy. After discussing it with her, I let her know that I could do a pattern and the inverse of it with relatively the same amount of effort. We decided to go with a pattern from Applesies and Foxnoses that is pretty and would really show off both colors.
I'm really pleased with how the tassels turned out on the end of the bands - I think it gives it a nice finishing touch and makes it look more like a handfasting ribbon than a piece of trim.
Here is a photo taken by the bride's sister (N. Collins) of the handfasting ceremony: