Advanced Retinol Oil for Youthful-looking Skin: COSRX’s The Retinol 0.5 Oil harnesses 0.5% pure retinol in a nourishing oil base with squalane and vitamin E to target deep wrinkles, uneven texture, and skin firmness loss. Suitable for all skin types, especially those acclimated to retinol, it delivers visible smoothing, strengthened resilience, and a luminous complexion over time. Size: 20ml / 0.67fl. Oz