Benefit Cosmetics Boi-ing Brightening Concealer. Benefit Cosmetics Boi-ing Brightening Concealer. Hey bright eyes. Bid adieu to dull, tired eyes, dark circles and discoloration with Benefit Cosmetics Boi-ing Brightening Concealer. This full coverage, creamy concealer contains brightening pink undertones ideal for battling imperfections while creating a radiant finish.. Brightening pink undertones color correct undereye circles. Creamy texture blends in flawlessly. Full coverage formula. 0.15 oz. BCOS-WU204. FM111. Founded in 1976 by a sister duo of San Francisco beauty lovers, Benefit seeks to bring laughter and fun to the world of cosmetics. Guided by the mantra makeup doesn't have to be serious to look good, Benefit's iconic products boast breakthrough formulas in loud, playful packaging, inspiring women all over the world to apply more lipstick, grab life by the giggles, and fake it 'til you make it.