A solid wound dressing material comprising: at least about 5 wt % collagen; from about 6 wt % to about 9 wt % polyvinylpyrrolidone triiodide (PVP-I); and from 0 wt % to about 20 wt % water; wherein the weight percentages are based on the dry weight of the composition. Also provided are methods of making such materials, and wound dressings comprising such materials. In another aspect the invention provides a solid wound dressing material comprising: at least about 5 wt % collagen; from about 10 wt % to about 90 wt % Cadexomer iodine; and from 0 wt % to about 20 wt % water, wherein the weight percentages are based on the dry weight of the composition. Also provided are wound dressings comprising the materials.