A controversial ingredient - Cyclopentasiloxane, used in most of the makeup products to provide a smooth layer on the skin. It is used to enhance the long stay & texture of the product. However, studies have show that it can disrupt the hormones, create allergies & other skin issues. In fact, you can feel a layer wherever you put a product with this ingredient. Skin can't breath & all toxins are trapped under this layer. This ingredient is also used a lubricant & a solvent.