I really wouldnt recommend the 187 for the natural MSF's, but I love it for Studio Fix. You need a more dense brush for MSF's (ones used for foundation) to get the full effect of the product. HOWEVER, for Mineralized Blushes and MSF's that aren't the "natural" ones, a 187 is the best brush to use. If I were you, I would definitely get a 187 for blush and Studio Fix, blush and whatnot, but if you're going to use any natural MSF's for foundation, you need a brush like the 182 or the 181 or 109.