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Thermoball technology is a revolutionary style of synthetic insulation developed by The North Face to bridge the gap between synthetic and down. Unlike continuous-filament materials, Thermoball is comprised of clusters that mimic goose down to create the pockets where heat is trapped. The Women's Thermoball Full Zip Jacket utilizes this technology. It is very compressible and light, and offers reliable thermal insulation (equivalent to 600-fill down). Now that I've finished that science lecture, here's what you need to know: when you're out in the elements and the weather takes a turn, you'll be happy you have this puppy on you to keep you toasty warm and happy (that's what it all boils down to).
FEATURES of The North Face Women's Thermoball Full Zip Jacket