According to Mac's webpage:
Water-based liquid foundation. Combines medium coverage with SPF 15. Provides a fresh, natural matte finish. Layers up, lasts long: helps protect the skin all day. Non-oily. 18 shades.
Octinoxate 7.50%. Ingredients: Water (Aqua Purificata) Purified, Dimethicone, Phenyl Trimethicone, Talc, Butylene Glycol, Polymethyl methacrylate, Polydecene, Glyceryl Dilaurate, Tea-Isostearate, Tea Stearate, Caprylyl Glycol, Kaolin, Tocopheryl Acetate, Ascorbyl Palmitate, Retinyl Palmitate, Hydrogenated Lecithin, Pantethine, Xanthan Gum, Cellulose Gum, Steareth-21, Magnesium Aluminum Silicate, Steareth-2, polyperfluoromethylisopropyl ether, Stearyl Alcohol, BHT, Disodium EDTA, Phenoxyethanol, Methylparaben, ethylparaben, Propylparaben [+/- (may contain): titanium dioxide (CI 77891), Iron Oxides (CI 77491, CI 77492, CI 77499), Chromium Oxide Greens (CI 77288)
This was my first high end foundation, and before I've started to experience with other foundation I've actually liked it, but now that I'm a bit more experienced in terms of makeup, I'm sure that you could find a better substitute for less.
I specifically dislike the texture of this product (too thick for my taste), and the color was a bit off, I'd personally prefer to use NC25 instead of NC30, but the sales lady insisted that I was a NC30....