Advance Stay Clean Dog Jackets use a revolutionary technology to provide enhanced comfort for pets and pet owners alike.Nanotechnology is used to make the 100%cotton cloth oil and water repellent.The surface repels anything external- be it water slime or ketchup. The quilted fleece lining and the added layer of insulation help keep your pets warm and the indoor equipment remains clean. The fabric is non toxic and environment friendly. It meets or exceeds the stringent requirements for Oeketex100 certification.