They are highly absorbent, all-natural, and gentle ... they allow you to store six sponges in the space of one. Whey dry, they compress down into a thin flat rectangle. When immersed in water ...

You can pick up a synthetic sponge for just a few dollars. But a natural sea sponge, hand-harvested from the Mediterranean seafloor, could set you back $30. Harvesting these sponges is dangerous ...