T-shirt, bra, and underwear maker Hanesbrands Inc is to test apparel made under its Champion and Duofold apparel brands by sponsoring an expedition to the summit of Mount Everest next year.

‘Expedition Hanesbrands: Climb With Us’ will be led by international mountaineer Jamie Clarke and his team who will be wearing socks, base layer, insulating layer, and soft- and hard-shell garments developed by Hanesbrands' R&D team.

A one-of-a-kind summit suit is also due to be unveiled in January to keep Clarke warm and mobile in the high winds and severe cold on the highest reaches of 29,035-foot Everest, the highest peak in the world.

“Champion and Duofold have a long history of authenticity and innovative apparel,” said Kevin Hall, executive vice president and general manager of outerwear for Hanesbrands.

“By bringing the strengths of both brands together, we are also exploring new cold-weather training gear inspired by the research and development we are doing for the non-commercial apparel Jamie will use high on Everest.”

Clarke and the climbing team will test prototypes of apparel that integrate unique innovations in fabric technology, garment design, and cutting-edge materials that have never before been used in apparel.

Some of the features include cellulosic yarn that has imbedded material that changes phase from a solid to liquid to hold heat; a seamless piece that has six different knit constructions to create varying performance by area of the body; and brand-new stretch-woven fabric that remains pliable at cold temperatures.

Two web sites and an online social community will follow the team’s progress.