Skinceuticals Daily Sun Defense SPF 20,this fast-absorbing oil-free sunscreen containing Z-Cote, a new transparent form of zinc oxide that provides a broad range of UVA and UVB protection. If you are an outdoor person or live in a sunny climate, this sunscreen will help prevent the visible effects of photo-aging (sun induced wrinkles). One container of this sunscreen will last approximately 3-4 months as you only apply a small amount.All skin type.