The supposedly bulletproof lenses on my Oakleys broke twice (once just from being hit by my car door when I closed it. I changed to Serengetis in February and find them the best sunglasses I've tried in 40 years. I bought them in Sunglass Hut and then wore them for extended periods every day when I was ferrying a helicopter from Europe to Nigeria. I found them very comfortable and can thoroughly recommend them. I also had a pair of Vuarnet's (bought in France) for many years and found them very good.