AO Flight Gear II Collection offers a wonderful combination of style and function. Flight Gear II are a wrap-around version of the classic AO American Optical aviator sunglasses. For over 100 years the original aviator shape has been a popular classic because it is the most functional of all eye shapes. AO Flight Gear-II frame is made from steel alloy and feature an eight-base curve. The lenses offer the highest ophthalmic standards and provide 100% UV protection and perfect optical clarity.