The Jason Markk Essential Kit includes a 4 oz Premium Deep Cleaning Solution and Standard Cleaning Brush. The perfect pairing for your all-around, general cleaning needs. The Premium Solution is formulated using natural ingredients, completely biodegradable, and is safe on all materials including leather, suede, nubuck, canvas, vinyl, cotton mesh and more! Please note: Jason Markk do not recommend 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 Cleaning Brush is recommended for cleaning delicate materials such as premium leather, suede or cotton mesh.