Composite materials

A structure comprising:

• A) a first porous sheet having an areal weight of from 1 to 20 gsm, said first porous sheet having an outside surface and an inside surface;
• and
• B) a plurality of parallel strips located on the inside surface of said first porous sheet, said strips each having a width and being separated from each other by a space having a width wherein each of said parallel strips comprises:
• a) a first structural fiber layer comprising unidirectional fibers wherein the areal weight of said first structural fiber layer is from 400 to 1800 gsm, said first structural fiber layer having an outside surface and an inside surface wherein said outside surface of said first structural fiber layer is located adjacent to the inside surface of said first porous sheet;
• b) a second structural fiber layer comprising unidirectional fibers which are parallel to the unidirectional fibers in said first structural fiber layer wherein the areal weight of said second structural fiber layer is from 400 to 1800 gsm, said second structural fiber layer having an outside surface and an inside surface wherein the inside surface of said second structural fiber layer is located adjacent to the inside surface of said first structural fiber layer;
• and
• c) a curable resin wherein said curable resin is located at the outside surface of said first structural layer such that said curable resin is in contact with the inside surface of said first porous sheet to provide bonding of said first porous sheet to said first structural fiber layer and wherein said first porous sheet remains substantially non-resin impregnated.