Stila Stay All Day Foundation & Concealer in Medium. Stila Stay All Day Foundation & Concealer in Medium. Stila's stellar base formulas, Stay All Day Foundation and Stay All Day Concealer are reunited in one convenient package. You'll be looking selfie ready with this lightweight, high-definition, oil-free foundation that perfects the skin with buildable coverage and a matte finish. Hidden inside the cap is a creamy, full-coverage, long-wearing, water-resistant concealer that blends seamlessly to instantly neutralize dark circles and hide imperfections.. Medium - suits medium to tan skin with golden undertones. Foundation contains Stila's proprietary Youth Revival Bio-Available Mineral Complex with 15 vitamins, minerals and antioxidants. Concealer has peach undertones to neutralize discoloration, making it easier to conceal imperfections with less product. Foundation (1 fl oz) and Concealer (0.04 oz). STIL-WU246. SB09090001. Created in 1994 by a top celebrity makeup artist, Stila is known for its modern, sophisticated, non-intimidating approach to beauty. The brand's innovative, multi-tasking formulas, eco-friendly packaging, and fashion-forward colors have cemented its place on must-have lists of top beauty editors around the world.