Mudtools Mudsponge - Variety 3 Pack From  £19.95

I am new to the art of pottery, learning throwing as well as flatware creation. The sponges arrived loose in the box (I almost tossed them out by accident). No information was included at all, just the 3 loose sponges, together with some items for glazing. It would be helpful to know more about them so that I use them properly, including how to clean and store them. Only then can I review these expensive items correctly!