Blow yarn has a soft fibre cloud held around a core. It can create impressive warmth and a light feel without the density of a traditional spun yarn.
Because the structure is airy, measuring gauge and washing a swatch are especially useful. A fabric that looks perfect on the needles may relax differently after its first gentle wash.
Choose a project where its halo and softness are part of the desired effect, and keep the stitch pattern simple enough to remain visible.
