At TRESemmé we understand the frustration of dull, dry and frizzy hair that's been damaged by styling appliances and other external factors. Our Keratin Smooth & Straight Conditioner formulated with Argan Oil and Keratin Protein gives you 72 hours of frizz control* and professional-quality smoothness for straighter hair with natural movement. It also detangles knots, boosts shine, adds softness and tames flyaways enabling you to achieve a hair look that is silky smooth, but still full of natural movement.