When it comes to cycling sunglasses, there are three types of frames. This includes full frame, partial frame, and frameless. The most unobstructed view is provided by frameless cycling glasses. While frameless glasses lack a frame, they are less sturdy and can't grasp your temples as tightly. Half-frames provide a compromise by providing stability to the top of the lens without increasing the bulk of a complete frame. Ultimately, everything comes down to personal preference.