Alter is an innovative product design project that aims to create a new sustainable narrative for the industry of shoe design. The project includes a variety of interchangeable shoe bases and uppers, that are created from different sustainable materials. There are endless options to the combinations the users can create to match their taste. Additionally, Alter promotes a lifestyle that is diverse and fun, but also practical and affordable. Moreover, experimenting with different recycled and up-cycled materials can help increase the lifespan of the product.