NARS Skin Smoothing Face Prep ($30.00 for 0.26 oz.) is a skin prepping product, not quite a primer, that’s supposed to minimize the appearance of fine lines and pores to give skin a smoother look.
Get closer to an Immaculate Complexion with NARS Skin Smoothing Face Prep. With one application, skin is smoother and the appearance of fine lines and pores is minimized. A truly multi-use product, it may be used before primer to create a flawlessly matte finish or used throughout the day to combat shine and rejuvenate the complexion. Apply to fine lines, large pores or rough spots for an instant smoothing effect. For all skin types.
I’ve seen some mentions about the product size being small for a primer–but it’s not meant to be used like a primer–perhaps a targeted primer, but even NARS describes it as being used before primer or as a blotting agent during the day. It still feels like it’s on the small size based on packaging, but I don’t see using too much per usage either. However, it does very much the same thing as MAC’s Prep + Prime Line Filler ($19.50 for 0.5 fl. oz.) (review here, swatches here), though Line Filler is listed as a primer.
NARS has a better consistency for on-the-go, since it’s almost like the consistency of a candle (yes, a candle!)–it’s thick and solid–but melts a bit when you apply it to the face or use your fingers to apply. It smooths out well against the skin, and it does minimize the appearance of the lines and imperfections on the back of my hand. It can be applied over or under foundation, but I think it may make a nice blot powder alternative, because of the silicone and silica in it, which both will help to give skin a softer, smoother appearance. The whole effect is very much a diffused, soft focus kind of look.