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. There is no better or more effective cleaning cloth for kitchens, countertops, bathrooms and general household cleaning, available anywhere. If You Care Sponge Cloths leave no streaks. They absorb liquids easily and quickly and release them with simple wringing. They are remarkably durable, tear and abrasion resistant, reusable over and over again, and can be machine washed in water up to 190F (88C), up to 300 times.