I have not written anything from 3M to acrylic scrubbers. I've been using Stavu. I've been using it for almost a couple of different types of scratches. , This one is a sponge, the other is natural? It is rough and rough plant of Bamani ~ So it is good to wash like burnt marks and use sponge when wiping like organic cup ~ When I use it for the first time, even if I soak it in water, it is stiff enough to fold in half. If you look soft, you can use it comfortably. If you have vegetable material, please purify it by sprinkling hot water or boiling water from water purifier. If there is a disadvantage, it is much smaller than existing sponge. I want to give 10 points out of 10 points ~