Velodrom Hector glasses sit comfortably under your helmet without pinching. The tight fit is obviously important to keep the wind and dust out of your eyes. This is done by leaving no gap between glasses and skin around your nose and inner corners of your eyes. The secret is a unique combination of functional design and careful selection of materials. Frames are made of Grilamid TR90; a flexible material which is strong enough to withstand unbelievable harsh treatment. Lenses are polycarbonate and available in three colors. Try them and your bike ride will never be the same.