Sponge resists staining and crumbling from mildew and frequent use.Large Sponge, 7-7/8"x1-5/8"x4-1/4 AST, PK 12 Highly absorbent, durable sponge is made of cellulose that is derived from wood pulp, a renewable resource. Ideal for washing woodwork, cars, boats and household cleaning tasks.