Clinique Smart Custom Repair Serum is a nourishing and effective anti-ageing serum. The concentrated serum is enriched with collagen-boosting ingredients and other anti-ageing actives, which visibly reduce the appearance of fine lines and wrinkles, improve the complexion, tighten and brighten. The result: smooth, supple and radiant skin with a restored youthfulness. Clinique's Smart Custom Repair Serum contains 30 ml, which, when used twice daily, lasts for 4 weeks.