| http://www.w3.org/ns/prov#value | - The second layer, or a single-layer embodiment, may include thermoplastic hydrophilic foam, thermoset hydrophilic foam, cellulosic foam, superabsorbent foam, foam materials with superabsorbent particles embedded therein, non-foam materials with superabsorbent particles embedded therein, fibrous materials, such as cellulose, staple fibers, and/or airlaid, with superabsorbent particles embedded ther
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