What it is: A travel-size skin care set featuring two of Sunday Riley's best-selling retinol products for calmer, even-toned, youthful skin. Set includes: - Travel-size Luna Retinol Sleeping Night Oil (0.17 oz.): an oil that works throughout the night to deliver visibly youthful, luminous, even-toned skin in the morning. - Travel-size A+ High-Dose Retinoid Serum (0.27 oz.): a retinoid serum that fights the signs of aging and improves the look of congested and UV-damaged skin.