I think I'm gonna go dig out all my warranty and receipt... from shaver to printer to mouse etc... I just remembered my Logitech MX died previously and although I got warranty card, they still need proof of purchase
IMO, Oakley sun glass has one of the best after sales service and warranty. Even if you do not have any warranty card they will still honor to repair + replace any parts for life! Just need to pay $30 for some administrative + service charge - no question asked. If got warranty card, $30 waive.