The present invention provides a hemostatic porous composite sponge comprisingi) a matrix of a biomaterial andii) one hydrophilic polymeric component comprising reactive groupswherein i) and ii) are associated with each other so that the reactivity of the polymeric component is retained, wherein associated means that said polymeric component is coated onto a surface of said matrix of a biomaterial, orsaid matrix is impregnated with said polymeric material, orboth.
