In this case the customer needed an invisible barrier for coarse dirt, tendentially dry, but which could also absorb any liquid residues (typically water based). The DRY ROLL carpet (https://www.acsupply.it/it/products/cleaning/item-1525) has responded to this need also from an economic point of view. An area of about 2.9×4.0m was placed alongside 3 bands of DRY ROLL 91cm. where both carts and pedestrians can pass over it. Everything was then finished with a black perimeter edging with high visibility red band. (https://www.acsupply.it/it/products/cleanroom/item-1309), in order to protect the access edges (especially for the wheels of forklifts) and at the same time to leave clear references when replacing the carpet due to wear over time. A 3 meters length runner was also built in another area for pedestrian access directly from the outside.