Threat: Pool chlorine or ocean salt. Apply a 10- cent-size amount of conditioner or lightweight hair oil to protect your mane. “Hair is porous, so the conditioner or oil will help prevent it from soaking up salt and chlorine,” says Amy Komorowski, a hairstylist based in New York City. USE: Moroccan Natural Argan Hair Treatment, $45, www. whathewants.com.sg.