Thank you for viewing. This is a DUOFOLD 2-layer underwear set, top and bottom, which has long been popular in America as a high-performance cold-weather undershirt for military and mountaineering use. It is a warm and comfortable item that combines an outer wool-blend fabric with an inner cotton fabric. While you may occasionally see these in used clothing stores, they are currently not available through distributors in Japan, and are also not handled by parallel import stores, making new items extremely rare. Size is US-S. Color is navy. Condition is unused, but the box is damaged. Thank you for your consideration.