100% biodegradable cellulose sponge that is only 2 mm thick when dry but grows to a full size sponge when wet. Can be composted at the end of its life. Dye-free and plastic-free.
I like this soft sponge that can be used on any surface that doesn't require scrubbing. Very compact when dry, it truly "blossoms" when you add water. Fun. The only downside: the 4-pack comes in a plastic pouch, but so do conventional sponges so overall still a better option.