The object is to provide a composition capable of forming a surface layer excellent in abrasion resistance, a base material with the surface layer, and a method for producing the base material with the surface layer. The composition of the present invention comprises a fluorinated ether compound having a poly(oxyfluoroalkylene) chain and a reactive silyl group, and a crosslinking agent having a plurality of reactive silyl groups and no poly(oxyfluoroalkylene) chain.