Helly Hansen's Odin 3D Air Shell Jacket combines 2-layer and 3-layer construction, which means that the jacket is classed as something as extraordinary as a 2.75L jacket. The jacket is completely water and windproof and made of really durable material. The most important detail for many is however the ventilation possibilities, which are endless with this jacket, perfect for an active summer holiday in the mountains!
2.75 L with 3D back