Jason Markk Deep Cleaning Solution is a high quality, concentrated, penetrating solution that lifts and cleans soils that are deeply embedded into the material of your footwear and other wearables. This gentle, foaming solution effectively cleans and conditions and is safe to use on most colors and materials including leather, suede, nubuck, canvas, cotton, knits and more! We do not recommend cleaning unsealed or painted leather. Use extra care when cleaning dyed suede as the color could bleed with any water contact.