The watch cap, a knitted hat that covers the head and ears, has a contested history. Some believe the knitted cap began to be made in Monmouth in Wales in the mid-1500s. In comparison, others believe that the invention of the pom-pom in Norway is a sign that a similar cap was made there that predated the Monmouth Cap. Other examples in history show the knitted hat has been worn frequently as a practical item to keep people warm. Due to its functional nature, it was adopted by the military. The name "watch cap" came from the hat the Navy wore in World War II, knitted and rolled up above the ear. The Naval hat is the cap Takahashi took inspiration from, making the knit Watch Cap from half alpaca and half wool yarn to achieve a felting and double-sided brushed finish. The grey colour is achieved using natural plant dyeing techniques.