The Dye-Free FlexTexture side of this sponge changes based on water temperature, becoming soft in warm water and firm in cool and is made with no added colorants. This makes it perfect for tackling tough stains and gentle enough for delicate surfaces. The spongy ResoFoam side is great for creating a soapy lather and wiping up spills. This sponge is designed to resist odors and stains, ensuring that it stays fresh even after multiple uses. Plus, it can be sanitized on the top rack of your dishwasher.