Jason Markk signature kit includes a 4 oz. bottle of Premium Shoe Cleaner and Standard Shoe Cleaning Brush. The perfect pairing to get you started or to maintain your cleaning fix. The Premium Shoe Cleaning Solution is safe to use on all colors and materials including leather, suede, nubuck, canvas, vinyl, cotton mesh and more! NOTE: Not recommended for cleaning unsealed, painted leather. Use extra care when cleaning dyed suede as its colour is likely to bleed with any contact with water. The Jason Markk Premium Shoe Cleaning Brush is recommended for cleaning delicate materials such as premium leather, suede or cotton mesh.