MAC Zerocool is a very warm-toned, very dark green with a sparkle finish. It is a limited edition lipstick that retails for $20.00 and contains 0.1 oz.
MAC Zerocool Lipstick ($17.00 for 0.10 oz.) is a medium, springy green with warm, yellow undertones and fine emerald green and gold pearl. I had such hopes for this shade, but it had a lot of slip, which gave it a glossier finish and made it harder to apply, as it was slightly streaky and applied unevenly. There was also color that slipped into my lip lines, which worsened over time. It had medium coverage, which did not build up well due to the amount of slip (just seemed to make the end result look streakier). The lipstick wore well for three and a half hours and was lightly moisturizing.
The Metallic Lips collection features a new (and limited edition!) finish, Metallic, which is supposed to be "rich colour [that] melds with smooth pearlized chrome." The range of shades is described as "vibrant, intense, [and] on-trend." The coverage varied from shade to shade--anywhere from semi-sheer to semi-opaque--but many shades look like they're more suitable for a subtle look or for layering on top of another lip product to add a more shimmery finish. The majority of shades featured finer shimmer, which translated to a more foiled, reflective look, but a few had some shimmer. The wear was between three and five hours, depending on the shade, and most shades had some slip but were not slippery overall, so they were comfortable to wear but not hard to maintain. They were vanilla-scented but have no discernible taste.
FURTHER READING: Formula Overview, which is a detailed review of the range as a whole.
Formulated to shade, define and showcase the lips, M·A·C Lipstick is available in every nuance of your favorite color and high-fashion texture. It's the iconic product that made M·A·C famous. AMPLIFIED CREME (A): Ultra-creamy. Quietly shiny. Color-packed! Hi-res: hi-impact. CREMESHEEN (C): Creme-based lipstick that imparts bright full color, with a soft and supple shine. FROST (F): Excellent color payoff with medium to high frosted shimmer-and-shine finish. LUSTRE (L): Demi-sheer with wet-look lustre finish. Very slick. Makes lips look soft, smooth, ultra-moist. MATTE (M): Pigment rich with intense color pay-off. No-shine, all matte finish. SATIN (S): Color-rich. Soft satin, semi-matte finish. Conditions while adding intense color.