Insulated radiant barriers in apparel

A reflective composite, comprising:

• a first substrate comprising a woven textile, stretch woven textile, or knitted textile having fibers of between 5 to 80 denier and being a moisture vapor permeable substrate;
• a first metal layer coupled with a surface of the first substrate, such that the metal layer substantially conforms to the shape of the surface of the first substrate and having a thickness of between 10 nm and 200 nm with an oxidation layer formed at a surface of the first metal layer;
• a second substrate;
• a protective layer coupled to the first metal layer with the oxidation layer and is moisture vapor permeable;
• a first insulation layer disposed between the first substrate and the second substrate, wherein the protective layer is in direct contact with the first insulation layer such that the first metal layer is spaced from the first insulation layer by the protective layer;
• and
• the first insulation layer and the protective layer are both disposed between the second substrate and the first substrate, the first insulation layer comprising air gaps, such that the first metal layer is provided exposure through the first insulation layer;
• and having a thermal resistance of between 0.05 m2K/W and 0.5 m2K/W.