The Siena vest designed by Jonna Hietala is a great example of an investment piece. It’s characteristic of men’s classic tailoring, to be enjoyed for years to come. Siena is a simple design, knit in worsted weight yarn from the top down. The button band is not made in the typical way, rather it is double knit separately and then sewn in place. This method of making the button band adds a professional finish. If you have some worsted weight yarn in your stash waiting for the right project, this may be it.