“Munenshi yarns” are made by combining the left twisted cotton yarns with water-soluble yarns, which is then twisted again in the opposite direction. "super zero®︎" is the result of further twisting the “munenshi yarns” to the right, then handled through hydrothermal treatment. This process melts the water-soluble yarns and expands the cotton yarns, which allows airflow through the pockets, creating an airy and one-of-a-kind yarn composition.
Like "super zero®︎", “munenshi-yarns” also use water-soluble yarns and are twisted in the opposite direction from its original, resulting in an almost untwisted composition. "super zero®︎" twists the yarns harder, which is the significant difference from “munenshi-yarns” and its unique characteristic. "super zero®︎" retains its twisted composition, there are no problems such as shedding or inferior durability, which are the drawbacks of “munenshi-yarns”.
The outstanding characteristics of "super zero®︎" is possible due to the vacuum steam press, that has been devised after many years of trial and error, This step is vital to make highly twisted, almost permed-like yarns to be suitable for knitting and weaving. The yarns are ironed out without melting the water-soluble yarns before undergoing the hydrothermal treatment. This ironing technique is unique to "super zero®︎" and differentiates its compositions from others.