Smoothing system. 4 - finish. Sleek.look 4-step professional smoothing system. Sleek.look iron smoother - step 4 - finish - flat-iron fast, stay sleek long. Invisible shield helps protect against heat damage (up to 400 degrees F/204 degrees C) and humidity. Maximizes performance of thermal looks by finishing the hair with heat-powered style memory. Lasting shine and frizz control. For silky straight, ultra-smooth results. Made in USA.