Minimum solid area (MSA) models are popular models for the calculation of the effective properties of porous materials and are frequently used to justify the use of a simple exponential relation for fitting purposes. In this contribution it is shown that MSA models. and the simple exponentials they support. are misleading and should be avoided. https://lecoureures.shop/product-category/course-a-pied-homme-vetements-collant-brosse/