Have you been trying to perfect your bun since the days of pre-school ballet? Yup, us too. Those days of fussing with pins and shoving loose ends into a half-ass bun are over. Sera Sloane of Bumble & Bumble schools us all on how to sculpt the perfect knot—using athletic socks as the classy girl's Bump It—via her "Hairstyle File" column for Opening Ceremony's blog. And we're going absolutely nuts over her genius idea! Thanks Sera, this is best thing since ketchup packets! Check out her revolutionary bun strategy here.