A porous article, for example a membrane, which comprises a porous hydrophobic polymer body whereof the surfaces including those within the pores have integrally incorporated therein a hydrophilic polymer which has been co-precipitated with the hydrophobic polymer under conditions such that substantially all of the hydrophilic polymer is at said surface and provides a hydrophilic surface throughout the hydrophobic body. The porous article may be a membrane, in particular for use as a wound dressing. Adhesives for wound dressings are also disclosed.
