Cezanne is non-toxic, naturally safe and effective. There is no vapor or fumes, so no need for masks, gloves or ventilation during the treatment—its nature’s way of smoothing. Our smoothing treatment is 100% formaldehyde-free. It’s also free from any other kinds of aldehydes and harmful toxins, for that matter, and it’s as long-lasting as the current top products. It’s hypoallergenic and dermatologist tested, won’t irritate the scalp and won’t release any noxious gases. Cezanne actually strengthens the hair, using a revolutionary low pH technology that restores bonds that are broken or damaged during thermal, mechanical or high pH services.