Most of the little joys in my life are accompanied by the word “free.” Free samples at the grocery store? Suddenly, errands become way more fun. Free lunch at the office? Happy day! But silicone-free hair-care products? No thank you. I love my hair shiny, soft, and frizz-free, so I’ll take my shampoo with a serving of silicone, please. That might surprise you. After all, “silicone-free” is a common label on shampoos and other hair products. But silicones can actually lead to shinier, softer, and more-resilient hair.The truth is that silicones, which are synthetic polymers derived from silica (commonly found in sand and quartz), are seriously high-performing ingredients, especially for people with stubborn frizz (including yours truly!). I spoke with hair-care experts about what silicones can do for your hair and why “silicone-free” shouldn’t be your North Star.