It's with good reason you can find the Flak Jacket in the peloton up on the Col du Tourmalet, as well as perched atop foreheads in the Whole Foods produce section. It's rare enough that a frame offers a universal fit and style (sporty, without being overly aggressive) with enough engineering to satisfy the needs of a pro cyclist just as much as a pro dog walker, but the Flak Jackets deliver. They don't feel overly sporty, nor do they underperform, ensuring they're never out of place in any activity - already an easy mainstay in my collection.
* while all Flak Jacket frames are the same size (with exception to the "asian fit"), the XLJ lenses feature a slightly wider lens profile
* granted, this is an interchangeable lens system, but it's much trickier than the PIVLock or Interlock systems from Smith, or the vastly superior Switchlock tech found in the Oakley Jawbones