For 30 years Rejuvenator Oil has been used by museums, collectors, decorators, and auto enthusiasts all over the world to maintain valuable leather. It is known world wide for its ability to soften and restore even cardboard hard leather back to useful condition. A complex blend of proteins and collagens, with absolutely no oil fillers of any kind. It is totally unlike any other leather product. It will not stain or discolor leather and is perfectly safe even for equestrian use.