L\'Oreal Infaillible 24HR Matte Powder. Introducing L\'Oreal Paris\' first long-wear powder foundation. Infallible 24h matte powder can be used when dry as a covering foundation or wet for even more coverage. The ultimate hold, non-drying texture and flawless finish every time. New Infallible technology gives this powder two uses: can be used when dry for a classic powdery finish with a sheer coverage or when wet for ultimate coverage as high as a liquid foundation.