Olaplex No. 2 is a salon-grade treatment that’s far stronger than the retail versions, and it’s made my hair so much stronger, softer, and shinier. Amy did an amazing job—she applied it to every strand, wrapped my hair in a warm towel, and let it sit for the full 40 minutes. Most salons rinse it out in five, but this made a huge difference! Highly recommend if your hair needs a pick-me-up!