Before we get into why we're all for Fall's current intarsia sweater obsession, let's talk about what intarsia is first. "Intarsia" refers to a knitting technique — not a fabric or a print — used to create multicolored patterns. And while it looks like the colors are interwoven, they are actually all separate pieces that just happen to fit together perfectly, like a jigsaw puzzle. It requires some skilled handcrafting, and as you can see, it manifests itself in bold colorways and quirky prints. Now, it should be obvious why the intarsia sweater craze is right up our alley. Sure, everyone — and we mean everyone — from Stella McCartney, Altuzarra, and Kenzo to Markus Lupfer, Marc Jacobs, and Mary Katrantzou is adding their own personal spin on the look, but the number one reason we're backing this trend? It's sweater season, and there's no better way to layer up than with a sweater that provides a much-needed burst of brightness and textural intrigue. Plus, these sweaters happen to make a pretty vibrant statement all on their own. Click through our editors' picks below and fall in love with your next (intarsia) purchase.Clockwise, from top left: Mary Katrantzou Fall 2012 runway, 3.1 Phillip Lim Kill the Night comic featuring the designer's intarsia sweaters, Kenzo Intarsia Angora-Blend Sweater ($640), and Paris Fashion Week street style.