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.* *TRESemme 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. Specially formulated to fight frizz, detangle knots, boost shine, add silky softness and tame those pesky flyaways, TRESemme Keratin Smooth Shampoo, with Keratin and lush Marula oil from Africa, gives you five smoothing benefits in one system, for hair that's silky smooth but still full of natural.