Out-of-autoclave prepregs are the construction material of choice for high performance marine craft, due to their high material properties, and relatively low processing costs compared to traditional autoclave prepregs. Because of the low compaction pressure, voids are not collapsed by external pressure; therefore air must be removed from the laminate prior to cure to ensure a low void-content, high quality laminate is produced. This work presents the development of experimental techniques to accurately measure the as-laminated void content, compaction response and in-plane and through thickness air permeability of two prepreg materials. The material models developed were implemented into an air removal model, and compared against experiments. Excellent correlation was observed for the cloth material, whereas the unidirectional material exhibited complete closing of air pathways, which was not captured well by the current model.