Let's give it to you straight. Our redesigned formula with luxurious Marula oil delivers not one, but five smoothing benefits so you can forget the frizz and indulge in gorgeously silky hair for up to 72 hours.* *TRESemmé Keratin Smooth Shampoo and Conditioner system vs. non-conditioning. Don't let unruly frizz ruin your style. When it comes to control, you should never have to compromise smooth for limp, poker straight hair.