Composite for providing electromagnetic shielding

A composite for providing electromagnetic shielding comprising:

• a plurality of nanotubes;
• a plurality of elongate metallic nanostructures;
• and
• a binder that fills at least a plurality of voids between the plurality of nanotubes and the plurality of elongate metallic nanostructures,
• wherein said plurality of nanotubes and said plurality of elongate metallic nanostructures form a mixture and are dispersed throughout said binder,
• the plurality of nanotubes consist of a plurality of nanotube yarns, the plurality of nanotube yarns is not aligned, and the plurality of elongate metallic nanostructures is not aligned;
• wherein the nanotubes have, on average, an aspect ratio greater than 100.