The main reason for using silicones in our skincare is that they enhance active ingredient delivery into the skin vs water-based or oil based products. Silicones are very big molecules, meaning they are not absorbed themselves but they allow the actives encased in the structure to penetrate the skin. That is why most serums on the market are water in silicone systems as these allow maximum penetration of the actives in the formula, to give the best results. Silicones are also widely used in the medical industry to deliver ingredients topically due to them being the best ingredients for delivering actives and their affinity with the skin. They give a really nice fresh, airy moisturising feeling without being heavy or shiny!