Since sisters Kendall Jenner and Kylie Jenner have been wearing her designs, Chinese-born, New York-based designer Haixi Ren and her label Ren have become a high-profile rising star in the fashion industry. Through her label Ren, the designer seeks to influence the fashion industry to take sustainability seriously. In the process, Ren's clothing deconstructs traditional fashion and craftsmanship, opting for 100% zero-waste garments that are "painted" on the wearer rather than mass-produced.

Her idea of sustainability is to use the human body as a "mold": the designer "paints" the human body by applying pieces of fabric to it, a technique inspired by her love of abstract expressionism in art. The whole process of fabric manipulation is very delicate, but there is no need to cut the fabric, resulting in zero waste. Like a jigsaw puzzle, Ren layers fabric pieces of different shapes and sizes onto the body. Large pieces of fabric are pieced together with smaller pieces, and sometimes the smaller pieces are felted into smaller fabrics or even made into yarn. The designer layers fabric after fabric to create unique textures. There is a great deal of spontaneity in her approach, as the silhouette of the garment can be adjusted in many different ways. The customizability of this technique is somehow comparable to haute couture.

Each garment is unique due to the infinite combinations of colors and textures.This aspect of Ren's work reflects her complaints about mass production, which is one of the biggest obstacles to sustainable fashion.Haixi Ren's ultimate goal is to create personalized couture garments for her clients rather than wasteful mass-produced garments.Haixi Ren has invented a technique that allows her to Haixi Ren has invented a technique that allows her to create garments from recycled fabrics instead of yards and yards of fabric, minimizing and subtly improving the quality of her products. Her name "Ren" means "responsibility" in Chinese, and she believes that as an artist, she has a responsibility to make her clients feel more empowered. She believes that the industry should spend more time creating rather than producing.