<p>A fibrous, porous web material of the non-heat seal type having a basis weight of 9 to 18 g m<-2> and comprises a first layer and a second layer juxtaposed thereto wherein the second layer has a smaller pore size than the first layer. The paper is useful for producing beverage infusion bags (e.g. teabags) from which there is minimal passage of fine particles from the bags into their packaging.</p>
