Lululemon Fluff Off Jacket Stained Glass Black and Grey Size 6 We designed this cozy run jacket to give us the warmth of a puffy without the fluff. 800-fill-power goose down helps us hold onto core heat, and vents in the torso and the arms let air out. Stretchy, sweat-wicking Rulu™ fabric side panels give us room to move in this slim-fitting layer. 800-fill-power goose down 800-fill-power goose down provides lightweight warmth featherlight insulation heat retention Rulu™ Stretchy, naturally breathable Rulu™ fabric is sweat-wicking and buttery soft four-way stretch sweat-wicking buttery-soft handfeel naturally breathable Glyde Water- and wind-resistant Glyde fabric on the front is lightweight and four-way stretch water-resistant wind-resistant four-way stretch lightweight