Conformable medical dressing with self supporting substrate

A medical dressing comprising:

• a backing layer with a first major surface, a second major surface, and an opening through the backing layer to form a window,
• a first adhesive coated on at least a portion of the first major surface,
• a self-supporting substrate comprising
• a first planar surface comprising a corrugated pattern on at least a portion of the first planar surface,
• at least one side wall at an angle between zero to one hundred eighty degrees to the first planar surface, and
• a second planar surface connected to the at least one side wall in the form of a flange,
• a second adhesive adhered to the flange,
• wherein the sidewall has a first periphery proximate the first planar surface and a second periphery proximate the second planar surface,
• wherein the second planar surface is connected to the at least one side wall continuously along the entire second periphery,
• wherein the second adhesive is attached to the backing layer to enclose the window on at least one of the first major surface or second major surface of the backing layer,
• wherein the medical dressing forms a hermetically sealed environment over a wound or other body site.