WORLD"S NEWEST PRODUCT!!! Unique, very efficient foam, which guarantees careful cleaning of footwear made of smooth and synthetic leathers, also with High Tech membranes, such as Gore Tex and Sympatex. F4 formula means four main aims: intensive cleaning, efficient impregnation, care and shine. This formula activates protective structure of polimer fibres during cleaning process and polishing. Contains precious, natural waxes. It is reccomended for footwear, bags, garment and gloves waterproofing and care. Thanks to Carbon technology this foam ensures extremely longlasting protection against dirt and dust. It keeps breathability of High Tech membranes. Frequency of use depends on weather conditions. It can be used directly onto leather surface. Having leather cleaned, it should be left until gets dry and further to polish with cloth, or hair brush.