You have: Longer hair
You need: Hair powder and leave-in conditioner. "Hair powder is the best thing ever invented for long hair," Serafino says. "It absorbs excess oil while providing lift at the same time." Leave-in conditioner, meanwhile, serves as a buffer for hair constantly exposed to sun, salt, wind, and water during summer months.
You should try: Tap some of Alder’s Patchouli Natural Hair Powder ($30, aldernewyork.com) into your roots and massage with fingers to give longer hair instant lift and a clean look (use on days you don’t wash your hair). For overall protection and shine, Butterworth recommends Kiehl's Crème with Silk Groom ($16, kiehls.com), a leave-in cream that coats and strengthens hair using natural oils derived from whey and soy protein, as well as jojoba oil.
Expert tip: Before applying cream, massage it between your fingers. "The key thing with all these products in application," Serafino stresses. "You want to emulsify with your fingers, not your hands. Your palms are not doing the styling, your fingers are, so use them to soften the product first."