Packable protection for cold, wet weather, The North Face Women's ThermoBall Jacket
features synthetic ThermoBall insulation which retains heat with cotton
ball-like fibers clustered together, creating a pocket of warm air.
Extremely lightweight, Thermoball insulation won't absorb water, keeping you
light, dry and comfortable. Similar to the Nano Puff from Patagonia, the ThermoBall is
highly compressible, stowing into a hand pocket for convenient travel.
Thermoball synthetic insulation has a warmth equivalent of 600-fill down