If you’re averse to DIY and prefer that your hair-care routine be entrusted to anyone other than yourself, these salon-exclusive treatments are for you. For volume: A trio of keratin, elastin and silk in Goldwell Kerasilk Repower Volume Service (from $40) strengthens and smooths, so hair is more receptive to your blow-dryer-and-round-brush routine. The result is hair-full-of-secrets-level volume for up to 10 washes. To repair: The L’Oréal Professionnel Pro Fiber treatment (from $27.50) begins by triaging hair based on three levels of damage. A rinse-out formula fills and seals off gaps in the hair cortex, and at-home products maintain the effect for up to six weeks.