Nature Smooth Express Treatment is the future of the smoothing category. This semi-organic formula allows you to maintain natural texture while increasing elasticity, manageability, shine and overall quality of hair. Nature Smooth’s dynamic heat technology allows for results to last up to 6 months depending on hair type, processing time and the amount of heat applied during the iron portion of the service. Nature Smooth meets OSHA and FDA standards. This advanced formula and application allow for no fumes and a potential service time of under 90 minutes. Discover Nature’s Smoothing Secret.