Champion Athletic Apparel has unveiled a final prototype of an extreme-weather suit called Champion Supersuit. The company claims to be using a material not available anywhere else.

The Champion Supersuit insulation is 3mm thick, compared with a typical goose-down jacket thickness of 40mm, and uses a nanotechnology insulation layer and a proprietary radiant warmth system.

The company claims that the result is a cold-weather garment "no thicker than a typical computer mouse pad" that provides equal insulating properties to typical extreme weather gear.

"The Champion Supersuit uses advanced technology to conserve, capture and return heat unlike any other extreme-weather apparel currently being used on Everest," said Mike Abbott, director of research and development for Hanesbrands, the parent company of Champion apparel.

"By developing the Supersuit and other garment layers to be used on Everest, we have identified new Champion products to roll out and new features and enhancements to potentially add to our everyday line of Champion Athletic Apparel."

Champion is outfitting a Mount Everest climbing team led by mountaineer Jamie Clarke. Clarke has been testing the gear and will wear a one-piece full-body Supersuit on Everest in April and May.

"We were given the challenge to develop a summit suit that would advance the state of cold-weather gear, that wouldn't look like anything else on the market, and that would protect climbers against extreme temperatures and conditions on Mount Everest," Abbott said.

"We have worked with several technology partners in and out of the apparel industry, including Element 21 Golf Company, which supplies the nanotechnology insulating material for the Champion Supersuit.

"We have made some significant breakthroughs, including the ability to use the nano insulation in commercially viable apparel products for the first time."