For the textile and clothing industry, sustainable fashion is an important trend in the future development of the whole industry. Currently, the most concerned green initiatives are recycling and reusing, environmentally-friendly packaging, environmentally-friendly new materials, sustainable fashion brands, sustainable fashion e-commerce, sustainable supply chain. Environmental protection is not only a kind of consciousness, but also needs to permeate all aspects of human life. In S/S 2021, men's knitwear integrates environmental protection into the design from patterns, stitches and detail crafts. And style will be suitable for various occasions to be both environmentally-friendly and wearable. With a more direct form, men's knitwear allows consumers to accept and support the concept of sustainable fashion and environmental protection.

With the rapid development of the society, we enjoy the fast-paced city life, feeling down-to-earth yet a little lonely. We are busy with life but eager to pursue true selves. We are social men, and also sober urban bystanders. Therefore, the minimalism becomes an important part of searching for selves and also influences clothing. The minimalism focuses on details, full of vitality, and particular about silhouette, comfort and the superior but basic texture. It is very suitable for the workplace clothing of the simple & sophisticated style.

In this complicated and crowded world, it is important to listen to your heart and enjoy the satisfaction and the sense of belonging. Communication can always express the warm experience, and conversation can inadvertently recall memories of youth in school days. The collaboration collection of Uniqlo and J.W. Anderson proposes the comfortable outdoor preppy style, inheriting the classic of England. In clothing collocation of stars like Li Xian, Xiao Zhan and Wang Yibo, the retro preppy style is still hot and will continue to sweep the mass market. The knitwear of Wang Ziyi is one of the collaboration collection styles of PEACEBIRD and Harry Potter, which is inspired by the Hogwarts School and four university design elements. After breaking the stereotype of preppy style under the binary perspective, memories of youth will bring an easy and slightly nostalgic feeling.