For all skin types. Retinol Silk is a 0.15% retinol in a timed-release, micro sponge delivery system. By using this type of delivery system, the retinol is as effective as a prescription strength tretinoin without the irritation. Retinol Silk helps to stimulate cell turnover, collagen production, exfoliation, and blood flow. This results in thickening and tightening of the skin and softening of fine lines and wrinkles. Cyclomethicone and dimethicone cross polymer act as an occlusive dressing. The gel-type product is contained in capsules with twist-off ends.