For some of us, the Oakley Bottlecap, or the groundbreaking (for its dual lens interchangeability) Half Jacket was our very first pair of sports sunglasses. That was over ten years ago, and both styles can still be readily found in the retail sector -- this speaks a great deal to the universal fit and radical design. In regard to the Half Jacket, it excelled in fit and durability, but lacked somewhat in timelessness. This is why Oakley has seen fit to update the design with the Half Jacket 2. 0 XL Polarized, while still presenting the same core fit and interchangeable lens functionality that made the original such a classic. From a design standpoint, most immediately apparent is how the 2. 0 mixes the outwardly curved and slightly wider fit profile of the Half Jacket, with the more confident hinges and sculpted earstems of the recent Fast Jacket.