If You Care Sponge Cloths are made in a patented process from a three dimensional blending of cellulose, non-GMO unbleached cotton and mirabilite – a natural mineral salt. During the production process, the mirabilite is washed out, leaving the remaining blend (70% cellulose & 30% cotton) extremely porous, which makes the sponge cloth extraordinarily absorbent. It can absorb up to 20 times its own weight in water. USE & CARE Rinse cloth and wring out excess water to increase absorbency. Use with water, soap and water, or any household cleaner. After using, rinse thoroughly, wring out water, and leave flat to dry. Cloth can be washed at temperatures up to 1900F (880C) in dishwasher or washing machine with normal loads. Do not use chlorine bleach or chlorine products. After washing, leave to air dry. Do not tumble dry. Did you know that both If You Care Sponge Cloths and their packaging are certified compostable? Throw them in your compost bin after use. No need to separate!