Lots of makeup lines swear by their primers. They've got primer for the face, primer for the lip, primer for the eyes..... but what do they do??
Basically, this is going to help your product, (be it foundation, eyeshadow or lipstick) go on smoother, and last longer.
Some even have fillers like silicone to smooth out the texture of the skin and give you a nicer more even application.
Some to swear by
Face:
Prescriptives makes a product called Super Line Preventor. It's fantastic! Not only does smooth out the texture of the skin, and make your foundation last and last,- it goes one step further and actually treats the skin for lines and wrinkles and helps protect the skin from harsh internal and external stresses with its powerful antioxidants.
Eyes:
Urban Decay makes a product called Primer Potion. It's got a silicone slip to it so it glides on effortlessly, and leaves a soft CREASLESS finish to your eyeshadow application. I also love that it's virtually colorless and perfect for all skintones.
Lips:
MAC makes a Prep and Prime product for the lip that is awesome!! It delivers a small amount of moisture to the lip area and helps to battle the feathering effect from your favorite red lipstick.
