Upcycling has become a major trend in the sustainable fashion movement, where designers transform old, unwanted clothing into new, unique pieces. This practice not only reduces textile waste but also encourages creativity and individuality in fashion. Brands like Marine Serre and Rave Review have built collections entirely around upcycled materials, giving old fabrics a second life while maintaining a commitment to reducing the environmental impact of production. Upcycling challenges the traditional fashion cycle and promotes a circular economy.