Fujibo Photochromic Yarn
Photochromic Yarn is developed by Fujibo Holdings, Inc., it is a yarn which color appears when ultraviolet rays of sunlight or black light hit on it. Various colors can be chosen, such as, blue, pink and purple. When ultraviolet ray do not hit on this yarn, it becomes achromatic/white color (the basic color of Photochromic yarn).
The best performance of this yarn would be one season.