A wound dressing material comprising a solid substrate having interstitial spaces therein, wherein said substrate is a hydrophilic open-cell foam material, and wherein said interstitial spaces are at least partially filled by a hydrophilic polyurethane foam different from said substrate foam material. Also provided is a method of making a porous wound dressing material comprising the steps of: providing a substrate of a solid hydrophilic first foam material； applying a fluid or gel polyurethane foam prepolymer mixture to at least one surface of said solid substrate； and curing said prepolymer in contact with said solid substrate.
