Ouai Treatment Masque
The product: Ouai Treatment Masque ($32 for eight)
Why we want it: Celebrity stylist Jen Atkin's line of hair care products is packed with fabulous formulas, but the one you absolutely need is this masque. Inspired by her clients in Dubai, who always make time in their busy schedules for hair treatments, Atkin packaged this ultranourishing formula in to-go packettes. Pack them in your gym bag and apply it before spin class, then rinse after your workout. Your strands will be silky smooth and smell delicious.