Sub-Surface creates a uniform surface on the face, preparing skin for concealer and creating a flawless face. The double-ended pre-concealer treatment includes a hydrating undereye primer to perfect your concealer application, paired with a blemish treatment to help heal spots underneath concealer. The anti-ageing eye primer contains squalane, a natural ingredient that is known to boost the skin's ability to regenerate, nourish, hydrate and protect itself. Squalane also softens the skin, diminishes fine lines, and assists in the acceleration of new cell growth. The blemish treatment has salicylic acid to battle blemishes and dry them out underneath concealer.