Multi-layer negative pressure incisional wound therapy dressing

A dressing for treating a tissue site with negative pressure, the dressing comprising:

• a contact layer comprising a polymer film including a plurality of perforations through the polymer film that are configured to open;
• a first manifold layer coupled to the contact layer, the first manifold layer comprising foam having a first density;
• and
• a second manifold layer coupled to the first manifold layer, the second manifold layer comprising foam having a second density that is greater than the first density, the second density between about 2.6 to about 8.0 lb/ft3, the second manifold layer having a first surface and a second surface including a plurality of holes extending therebetween, wherein the plurality of holes are configured to collapse from a relaxed position to a contracted position in response to an application of negative pressure to the dressing.

A dressing for treating a tissue site with negative pressure, the dressing comprising:

• a contact layer configured to contact the tissue site, the contact layer comprising a polymer film;
• a first manifold coupled to the contact layer, the first manifold comprising foam;
• and
• a second manifold coupled to the first manifold opposite the contact layer, the second manifold comprising foam having a plurality of first regions having a first density and a plurality of second regions having a second density less than the first density;
• wherein the contact layer is configured to be between the tissue site and the first manifold when the dressing is applied to the tissue site.