Benefit Cosmetics Hello Flawless! Oxygen Wow Liquid Foundation in Beauty: NA. Benefit Cosmetics Hello Flawless! Oxygen Wow Liquid Foundation in Beauty: NA. Effectively taking your look to the perfect place, Benefit's Hello Flawless! Oxygen Wow Liquid Foundation is in a class all its own. The lightweight, oil-free foundation offers customized coverage and builds for a naturally beautiful result. The signature formula suits most skin types as it hydrates and protects against skin-damaging rays, giving you a look that's luminous, healthy and natural.. Suitable foundation for dry skin types. Features light-diffusing properties with a natural, luminous finish. Blends and builds for light to medium coverage. 1 fl oz. Packaging may vary slightly. BCOS-WU108. IB229US. 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.