Xiem Studio Tools PRO-SPONGE - Green (1 per Pack) An extremely soft, super absorbent and long-lasting chamois sponge.Tapered edges give fine control for working with either porcelain or stoneware clay.Use the finishing sponge for adding final refinements to any clay body. PRO-SPONGE - Blue (1 per Pack) The Ultimate Sponge for Throwing and Finishing Porcelain ClayUse: Excellent for throwing and finishing on porcelain and white clay bodies. Soak the pro-sponge in water and wring it out before use. It will expand one and half its size. Care: Rinse clay-built up in clean water after use. It will return to its original form when dry and remain soft. Clay Sponge For All Clay Bodies - Red (2 per Pack) Soak the sponge in water and wring it out. Repeat a couple of times before use. It will stay soft when dry.