Using these Tifosi Sizzle sunglasses is easy. Just put them on your face and adjust them for a comfortable fit. When not in use, store them in a protective case to avoid scratches. Clean the lenses with a soft, microfiber cloth and mild lens cleaner. Avoid using abrasive materials as they can damage the lenses. Also, don't expose them to extreme temperatures or direct sunlight for long periods as it may affect the frame and lenses. With proper care, these sunglasses will serve you well for a long time.