Described is a water-absorbent composition containing from 30 to 100% by weight, based on the water-absorbent composition, of water-insoluble water-swellable hydrogels characterized by the following features: Centrifuge Retention Capacity of at least 24 gg, Saline Flow Conductivity of at least 80107 cm3 sg and Free Swell Rate of at least 0. To be concrete, a polymer resin film produced by the solution film forming method characterized by that the pitch a cm of the periodic thickness unevenness of web longitudinal direction and a thickness unevenness factor d % satisfy formula described below. In a preferred embodiment, at least one face of the pocket comprises a transparent polymeric material to allow easy viewing of the card. One end of each of the L-shaped and inverted reversed-L-shaped slots is connected to an extension slot. This may be accomplished by providing a host device having relatively short-range communications circuitry integrated therein, which circuitry may be operative to communicate with relatively short-range communications circuitry of a multi-protocol or long-range communications device that also includes relatively long-range communications circuitry.