Detergent products for laundry are used on a daily basis. The ingredients used may increase or decrease the release of micro-fibers. MERMAIDS released in December 2015 a review of the ingredients used in different types of detergent products in Europe (Report Task A.2.2.1; Study of the different types of commercial laundry additives and their contribution to the reduction of fibre breakage) . All of these contain surfactants and most of them polymers and alkaline agents. The next step is to study how these products can increase or decrease the release of microfibers in the water depending on the number of washings. The influence of some ingredients in the fiber care is expeted to be determined.