It's always prime time for primer. Aside from helping your makeup stay flawless for hours and hours, there are all kinds of benefits—anti-aging, skin brightening and softening, smoother texture, sealed pores. You get the idea. But adding another layer beneath your layers isn't always appealing to everyone, especially those of us that like that minimalist no-makeup look. So, go with one of these great lightweight primers so you can reap all the benefits without feeling bogged down by beauty.