Using these Rexha sunglasses is super easy. Just put them on your face and adjust them to fit comfortably. When you're not using them, store them in the provided case to prevent scratches. Clean the lenses gently with a microfiber cloth to keep them clear. Avoid leaving them in direct sunlight or hot places for a long time, as this may damage the frames. Also, don't use harsh chemicals to clean them, as it can harm the lenses and frames.