The knitting industry has already emerged as a game-changer for sustainable fashion. This chapter illustrates the advancements made in the field of the knitting sector such as 3D and 4D knitting, seamless knitting, and computerized fully automated knitting that are making significant contributions towards building an eco-friendly sustainable future for the fashion industry. Alongside ensuring sustainability, these advancements are opening new doors to possibilities for the production of smart technical textile products with high-performance functional benefits. Nonetheless, these advancements are associated with significant challenges that are being pointed, discussed and resolved accordingly with a view to fully exploiting these technologies for the intended purpose. By continuing research, collaboration and investments, these advanced knitting technologies can be turned into a more effective solution to a sustainable fashion future while proving the fact that sustainability and innovation can go hand in hand.