Norrona Senja Warm1 Hood fleece is developed for trail running but will work well for all kinds of outdoor activities. Norrona Senja Warm1 Hood fleece is developed for trail running but will work well for all kinds of outdoor activities. Norrona uses lightweight warm1 fabrics because it offers great durability, quick-dry and warmth to weight properties. The main fabric is a 100% recycled knitted polyester 140g/m2 with UPF 50+. In the back and under arms Norrona uses a lighter more open fabric for better moisture management. It is a 100% recycled polyester of 127 g/m2 with a mesh construction and a UPF 30+. Both fabrics is trathed with HeiQ Fresh FFL anti-odor treatment. HeiQ Fresh FFL is a bio-based amino sugar polymer that is silver-free and not an antimicrobial. It removes the fat and protein from sweat, thereby eliminating the ability of the bacteria to grow and therefore reduce odor. Main features include: fitting hood, chest pocket, mid length zipper in the front for ventilation, stretchy cuffs with hand gaiter functionality. This mid layer has a technical fit.