At the torso, the Women's Nula Hybrid Hydroloft Jacket is packed with a synthetic Hydroloft® Polyball insulation, trapping heat and keeping your core comfortable and blocking harsh alpine winds. At the arms and sides, knitted fleece arms offer an impressive freedom of movement; perfect for weaving your way across technical trails.  Packable, the Women's Nula takes up minimal room when in your rucskack, neatly stowing into its own pocket and produced with Bluesign approved fabrics, it's created in a more environmentally friendly process.