“…Microplastics are further divided into two categories, primary and secondary microplastics; this information has been clearly discussed in many recent articles [ 10 , 11 , 12 , 13 , 14 , 15 , 16 ]. Microplastics can stem from a range of resources consisting of synthetic textiles, tires, roadway markings, aquatic coverings, personal care/cosmetic products, and crafted plastic pellets, as well as from the gradual fragmentation of bigger plastics over time [ 17 ]; among these sources, the domestic washing of garments has the highest potential for the generation of microplastics [ 18 , 19 , 20 , 21 , 22 , 23 , 24 ] ( Figure 1 ). In addition to petroleum-based plastic fibers, man-made cellulose fibers (e.g., viscose rayon) have also been detected in different environmental matrices of deep-sea sediment and macroinvertebrate fishes, thus increasing the interest of the scientific community in this kind of plastic pollution, which is usually underestimated [ 25 , 26 , 27 ].…”