Fashion, Apparel and Garment Design Zuoxi Rainbow Down Jacket by Wenhua Wu, Zhijuan Ding, Mei Liu Zuoxi Rainbow is a down jacket designed for children. The color palette is inspired by natural rainbows and offers an alternative to the muted tones of common winter clothing. The outer shell is made of lightweight nylon silk with a protective finish that resists oil, stains, and water without reducing breathability or color intensity. A widened windproof hood blocks cold wind, while a silver ion layer on the back helps retain heat. Ergonomic tailoring supports comfort and free movement during outdoor activity.