7 of the Best Products to Keep Your Hair Straight and Smooth

Best Overall: Matrix Total Results Mega Sleek Iron Smoother

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Users love how this leave-in spray eliminates all signs of frizz, even in extremely humid weather. Spritz all over damp hair—from root to tip—right before styling. Infused with shea butter, the formula not only smooths misbehaving hair but seals the cuticle to keep it smooth throughout the day. It also protects strands from severe heat—up to 450 degrees—making it an ideal product for those who like to heat style their hair. It is also intensely moisturizing, giving thirsty hair much-needed hydration.

Best for Curly Hair: John Frieda Frizz Ease 3-Day Straight Flat Iron Spray

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Sleek, tame hair for three days straight? Did this product catch your attention yet? Polymers and keratin proteins dive deep into your hair to keep that smooth, polished look going and going—which means less time styling your hair and more time sporting it. It also doesn’t leave hair feeling stiff—your strands still have a natural bounce.

Best for Frizzy Hair: Kératase Discipline Keratine Thermique Blow Dry Primer

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Makeup primers prep the skin for subsequent products, blur any imperfections and also protect the skin. Sounds like the kind of type of primer we’d like for our hair too, right? Well, you’re in luck. This leave-in primer does all of the above and more. The non-greasy cream glides onto wet hair, coating each strand to smooth the cuticle and provide heat protection. The anti-frizz and anti-humidity formula is made with keratin and ceramides, both efficient in restoring hair’s smoothness and natural movement. 

Best for Fine Hair: Kiehl’s Heat-Protective Silk Straightening Cream

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Fine and unruly hair sounds like an oxymoron, but it’s a thing. The trick with this specific hair type is a texture and formula that won’t weigh hair down but is strong enough to smooth and tame unmanageable locks. Enter: A versatile product that is equal parts protective and straightening. Sesame and sunflower seed extract keeps humidity out and nourishment in. Users note that the texture isn’t greasy and a little goes a long way.

Best for Colored Hair: Olaplex Hair Perfector No. 3

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Visit any nearby salon and you’ll surely see this brand lined up at the front desk, each station, and by the shampooing section. This science-based brand is known for creating innovative products that actually reverse hair damage. And now you can strengthen your locks on your own right at home. Users call this solution a holy grail product and with good reason. The coveted formula repairs the bonds of your hair—bonds that have been broken by either coloring your hair, applying heat to your hair, or perming your hair. It penetrates each strand to effectively strengthen your hair from within.

Best Budget: TRESemmé Keratin Smooth Hair Shine Anti-Frizz Serum

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Users rave that this product leaves their hair feeling silky and soft—exactly the kind of hair you want to run your fingers through. Unlike the other products in this roundup, this one should be applied from the ends upwards to mid-length. To style, blow-dry hair in sections, ensuring there are no damp pieces, then finish off with a flat iron for truly pin-straight strands.