Martha Stewart Tools by Plaid is a line filled with tools for every project, because using the correct tool always makes crafting easier. Sea Sponge Set 6pc- Durable, reusable, and grit-free natural sea sponges provide smooth application. Great for creating mottled effects with paint or glaze. Six sponges include four 1" and two 1.5". Wash while wet with brush cleaner or mild soap and water.