The focus of this degree work is on material interaction within the field of knitwear. Material combinations are often seen in fashion as a decorative effect to add shine, transparency or blocks of colour. The materials are put together as one flat material. This work embraces the different qualities and explores the possibilities to use material interaction as a way of creating form on the body. To achieve this, material experiments have been made to find combinations that had a big impact on each other. The materials that were found to be most suitable for this were the combination of metal and lycra yarn. This combination showed contrast in both volume and in density. The result is a collection of seven examples that is based from square knitted pieces where the interaction changes the form of the material and the garment. Creating form from material combination could lead to a new method of creating garments with larger form possibilities than is seen today in ready to wear knitted garments.