Goldwell Dualsenses Just Smooth 60Sec Treatment 6.76 Ounce 200 Milliliters Achieve soft, smooth hair with Goldwell Dualsenses Just Smooth 60 Second Treatment, a nourishing formula that works to smoothen and tame the appearance of unruly, frizzy hair. Apply to towel dried hair. Massage into roots and through ends. Leave on for 1 minutes. This advanced hair smoothing Treatment regenerates hair instantly up to 100% within 60 seconds.