NWT YSL Touche Éclat Blur Primer. Size: 0.33 fl. oz. What it is: A primer with a radiant finish What it does: Gives skin a pretty glow, and helps foundation wear longer Who it’s for: If you’d like your base to have a more luminous finish, this helps get you there—and it helps prevent foundation from settling into lines or fading by lunchtime What it does: It combines the light of Touche Éclat and the perfect effect of Blur Perfector to blur imperfections and smooth the look of skin. The primer is formulated with four nourishing oils that leave skin feeling incredibly soft without a greasy residue. Immediately the look of skin is improved, pores are diminished, skin's texture feels smoother and skin's tone looks more even and luminous. Its formula is free of dulling opaque fillers. YSL Beauty Touche Éclat Blur Primer has a glittering golden effect in the bottle, but on skin it’s all radiance with no obvious shimmer. “You'll just get a velvety glow... and foundation that lasts all day,” says Allure’s Jenny Bailly, who tried out the primer. Smooth a little over your skin as a radiant prep step for foundation or mix it into your favorite base in the palm of your hand before applying—it gives you a sheer, more luminous finish. The primer’s radiant effect is so pretty, “I don't always use it as a traditional primer. Sometimes I wear it alone, under sunscreen, in the morning,” says Bailly.