Therefore we based the concept of our UF PRO® Delta ML jacket on the original mid layer design, but added specifically functional elements that would qualify it also as an outer layer winter jacket for all outdoor activities in extreme cold weather conditions. Especially for higher work-out levels, we optimized the thermo physiological properties of the excellent 110g/m2 G-Loft isolation. That is why we applied a tighter quilting pattern to all areas where better heat exchange is required. Also we made the side- and armpit areas out of the 37.5™ microfleece from COCONA® Inc., which provides quick re-drying properties and good thermal insulation. The pockets are configured for both wear preferences. The Striker sleeve pockets and a lower front pocket, to wear the jacket as an outer layer and chest pockets for the mid layer version. The Delta ML jacket is above all a light weight and compressible piece of equipment, which offers reliable and comfortable thermal insulation in a wide range of outdoor activities.