To use these Tifosi Rail Race sunglasses, simply put them on like regular sunglasses. The adjustable nose and ear pieces allow you to customize the fit for maximum comfort. When you're out cycling or doing other outdoor activities, they'll protect your eyes from debris and harmful UV rays. As for maintenance, clean the lenses with a soft, dry cloth regularly. Avoid using harsh chemicals as they might damage the lenses or the frame. When not in use, store them in a protective case to prevent scratches and damage.