La Roche-Posay Effaclar Mat is a specialized moisturizer designed to control excess sebum and minimize enlarged pores. This mattifying formula provides long-lasting shine control while hydrating oily and combination skin types, making it an ideal daily moisturizer for those struggling with oily skin concerns. The product contains Sebulyse technology which helps regulate sebum production and tighten pores. It has a non-comedogenic formula that won't clog pores and is suitable for sensitive skin. The moisturizer can be used as a makeup base and should be applied morning and/or evening after cleansing. The formula includes La Roche-Posay Thermal Spring Water and has been tested under dermatological control.