Frequential is a special collection of Hats using short row colourwork. Inspired by classic sci-fi with a proportional design principle, each Hat in the collection features a striking motif, designed to introduce the colourwork technique in a more accessible way.

Due to their construction, each of the patterns in this collection are graded through gauge and/or needle size. Each of the patterns are provided in both written and charted format. Each design includes both a beanie and slouch version. The book contains detailed photographic tutorials for the techniques used.