Enlarged pores Very dry skin Anti-Ageing: Paula's Choice Smoothing Primer Serum SPF 30 A primer, serum and SPF-in-one to prepare your skin for makeup. Get better looking makeup and skin in one. This product is a primer, serum and SPF in one. The light-weight texture softly blurs imperfections for flawless makeup application, while SPF 30 protects skin from sun damage. Its serum-like formula is packed with antioxidants to protect skin and leave it soothed and radiant.