Restores Supple Feel & Rich Leather Scent Protects Leather Upholstery Use With Z-9 Leather Soft Spray Cleaner 8 Oz. After using Zaino Z-9 Leather Cleaner, following-up with Zaino Z-10 Leather in a Bottle keeps your Corvette's leather interior soft, supple and smelling like new. Contained in Zaino Z-10 is their Ultra-Gard UV-40 to protect your Corvette seats from the sun. Additionally, Zaino Z-10 has real leather oil concentrate that restores the original rich leather scent leaving a non-sticky, greaseless, stain repelling natural luster. Every 60 to 90 days, just wipe on Zaino Z-10 and allow it to dry. There's no buffing necessary to enjoy the great results.