Additive manufacturing (AM), also known as 3D printing, encompasses a wide range of techniques for various applications, from production on demand to functional prototypes. 3D printing is mainly used in industrial sectors such as aerospace, automotive, medical, dental, construction, art and fashion. Fossil fuel-based materials such as plastics, metals, and concrete, etc. are widely used to manufacture 3D printed products. Fundamentally, innovative 3D technologies using new bio-based renewable materials have shown promising results for everyday applications, opening new opportunities for sustainable 3D printing in the future. Developments in 3D printing with biomaterials are pursuing the goal of creating a truly sustainable economy. A very important key aspect of sustainability in additive manufacturing is the fact that traditional garment production produces a lot of waste during cutting and sewing, which is completely eliminated in additive manufacturing. A major challenge of the fashion industry, which must be overcome with the introduction of 3D printing is the accessibility to normal consumer market. In addition, the convenience, wearing comfort and flexibility of 3D printed fabrics and garments should be established, because 3D printed objects are usually relatively stiff, and therefore manufacturers need to choose between material and structure-based flexibility. Some designers have also developed some techniques, such as direct-to-garment, partial garment printing and fabric-like printing. The question of whether or not 3D apparel printing is sustainable is a difficult one to answer, as many aspects need to be considered both on the material side and throughout the lifecycle of the product. Most sustainable would certainly be to focus on a cradle-to-cradle system, so that no new material needs to be produced at all and only worn-out products or other plastics are used to make new garments. Overall, 3D printing in the garment industry opens many doors towards a more sustainable production in the future by addressing customers and their consumption behavior and additionally focusing on more sustainable materials and production.