Kit Contains: (1) 60ml Bick 1 (1) 60ml Bick 4 (1) Cleaning cloth (1) Carrying Case (1) How to Care for Leather Brochure. Bick 1 is an aggressive cleaner for smooth leather. It has been proven to remove soil, grease, spur marks, and most food and ink stains. Bick 4 Leather Conditioner accomplishes four important jobs. It conditions, cleans, polishes, and acts as a stain repellant, making it ideal for keeping leather soft while preventing the leather from drying and cracking. It is effective on all smooth, finished leathers, including exotics. Unlike other brands, Bick 4 is a wax-free product that will not seal pores of leather thereby affecting breath-ability. Bick 4 will not darken any colorcast leather or deteriorate the stitching.