Ever since the Brooklyn-based accessories brand GREI. launched in 2011, I was an immediate fan. I'm so happy they've been growing and producing bigger collections because it's all so good. They've got such an acute aesthetic, and I love how practical it all is. Recently the boys behind GREI., who have to be the nicest guys in fashion, collaborated with TSE Cashmere (pronounced "say"), the long-time luxury cashmere brand, on a four-piece bandana capsule. As a bandana wearer, I'm happy to see the emergence of the "grown up bandana".  These bandanas (made from cotton, not cashmere) are sophisticated but still understated. The collab bandanas aren't available online, but you can find them in TSE stores around the globe. In the US, that's: New York, San Francisco, and Lake Forest, Illinois.