PAUX explores auxetic structures in fashion: garments that expand and contract in response to the body. Designed to support the physical changes of pregnancy and the postpartum period, the project uses a Material Driven Design (MDD) approach to embed structural flexibility directly into the textile. Through techniques from 3D printing, kirigami, origami and smocking, it enables controlled, predictable expansion while preserving the garment’s aesthetic longevity, rather than relying on sizing or stretch.