The Mountain Equipment M PAIYU JACKET offers outstanding thermal insulation with minimal weight and a small pack size, ideal for demanding use in remote regions. The innovative combination of a 2-layer offset chamber construction with a heat-reflective layer creates a down jacket that is lightweight, flexible, and extremely compact. This technology enables a level of thermal performance that previously could only be achieved with complex box chamber constructions. Robust and technically sophisticated, the Paiyu Jacket is the perfect choice for high-altitude mountaineering and long expeditions where reliable warmth and low volume are essential.