There's something undeniably timeless about a tweedy, herringbone jacket. It's one of those gentlemanly staples that looks good on just about everyone and adds some nice dimension and texture to any look. Of course, it's always been more of a fall/winter fabric. Until now. Brands like J.Crew and Rugby are offering featherweight versions cut from crisp Italian linen in slim, modern silhouettes that look even better after a couple of wearings (and a few wrinkles). Slightly rumpled but still respectable, they offer an air of rakish elegance to jeans or even camo military shorts.