This is interesting it’s a beach mat that filters out grains of sand ensuring they remain where they belong, that’s on the beach. The mat which was originally developed for military use to keep the dust off of helicopters has holes that are just wide enough for grains of sand to fit through. The clever part is that it acts as a one way filter so once the sand has passed through it doesn’t come back. It also claims to eliminate dirt, dust and water ensuring an always clean surface. It sounds like just the thing for the beach and at £40 not too expensive either.