M.A.C Cosmetics Studio Fix Every-Wear All-Over Face Pen - NW55 (Rich Mahogany with Neutral Undertones) - 0.41 fl oz / 12 mL. Click, tap, go! Conceal and correct with this multi-use concealer pen that doesn't cake or crease. This lightweight, hydrating formula provides medium-to-full buildable coverage with a natural matte finish. It's transfer-proof, waterproof and lasts for 36 hours for superior wear. Use to spot conceal blemishes & undereye circles or use all over to correct redness and even skin tone.