Duofold began its tradition of innovation in 1906 with the introduction of the first two-layer warm wear. Since that time, Duofold’s dedication has resulted in hundreds of high performance products . In 1960 Duofold launched the beginnings of the now popular Varitherm high performance products seen below. Throughout its history of innovation, Duofold has helped prove that.. there are no limits… Duofold has helped Everest climbers succeed, Olympic participants win medals, Ironman athletes triumph and week-end warriors perform their best under the most challenging conditions.