Using these Tifosi Stash sunglasses is easy. Just put them on your face and adjust the ear pieces to fit comfortably. They are suitable for various outdoor activities like cycling and baseball. When you're using them, avoid scratching the lenses. Don't leave them in direct sunlight for a long time, as it may damage the frame. To clean them, use a soft cloth and some mild lens cleaner. Gently wipe the lenses and the frame to keep them in good condition. Also, store them in a protective case when not in use to prevent any accidental damage.