Pro-Techs Premium Silky Hair Keratin Botox 250ml is most advanced and new hair botox technology in smoothing and reconstruction of hair with keratin-collagen-protein. 0% formaldehyde released before, during or after the treatment. It is a revolutionary, hair reconstructor and volume reducing treatment that eliminates frizzy hair, leaving it straight, healthy and shiny to three or four months. It works on all hair types.