The Bionnassay 700 is a jacket designed for people who regularly climb mountains (all year). The design problem: “Climbers are people who live with their arms in the air!” Most jackets are usually designed for an arms-down position. “Why not create a jacket with sleeves in the air”. The design solution: The solution is to design the jacket with the arms up, using an ergonomic Y-shaped pattern. In this way, the climber ascending the mountain always has protected arms and the jacket does not ride up. In addition, it has a detachable snow-shield flap which means the jacket can be used for climbing both summer and winter. Its hood has been enlarged so that a safety helmet can be worn underneath.