Using these sunglasses is easy. Just put them on your face, and they'll fit comfortably due to the well - designed temple length. When you're out in the sun, they'll block UV rays, protecting your eyes. As for care, clean the lenses with a soft, dry cloth to avoid scratches. Don't leave them in direct sunlight for too long as it may damage the frame material. When not in use, store them in a hard - case sunglass holder to prevent them from getting bent or broken.