Is it a shirt? Is it a scarf? Actually, this beauty is a little bit of both. We’ve nattily transformed an Italian-made silk twill square into a shirt design, which basically means it fits every shape and size, whichever box you tick. The fuss-free silhouette waterfalls off the arms, and that neck foulard? It’s detachable, so you can whip it off, let it fall or...