Why are waterproofing and breathability features placed in the lining of the down vest?

The outside is water-repellent, and the inside is waterproof and breathable^[1]. FreshService's CORPORATE DOWN VEST separated the functional roles of the outer fabric and the lining inside and out^[2]. Generally, water repellency is a finish that bounces off water droplets that touch the fabric surface, waterproofing blocks water from seeping in, and breathability is a feature that expels sweat and water vapor generated by the body to the outside.

A smooth MICRO RIPSTOP NYLON material that withstands friction well was used for the outer fabric^[3]. This means that the fabric does not easily tear even if the garment brushes against bag straps or walls, and you can stay active by lightly brushing off light snow or rain that hits the outer surface with your hands.

On the inside, there is thermal insulation filled with a ratio of DOWN 80% and FEATHER 20%^[4]. The waterproofing and breathability features of the lining serve to prevent external moisture from reaching the feathers, while at the same time expelling moisture that builds up from body heat during activity to the outside^[5]. Because it protects the filling from losing its loft by absorbing sweat, it is suitable for maintaining a light and warm volume even when worn and moving around for a long time in cold weather.