There's nothing we love more than picking our hairstylist's genius mind for tricks of the trade—whether it's how to keep a blow-out bouncy (pin curls!) or fight oily roots (only apply conditioner to the ends, skipping the top half of your hair). Our newest lesson? The shampoo sandwich, a technique born in New York salons and now rising fast on TikTok.

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What is a shampoo sandwich?

A shampoo sandwich is just what it sounds like: the process of sandwiching your application of shampoo between layers of treatment. It’s a way to maximize color retention while still looking after the hair. Here’s how to do it:

Apply a reparative or protective treatment or conditioner to the mid-lengths and ends of dry hair.

After leaving it on for the allotted time, rinse the treatment out.

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