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the new synthetic alternative to down
The North Face™ developed a partnership with PrimaLoft® to
offer a new synthetic alternative to down. ThermoBall™ is a revolution
in insulation technology. Unlike traditional, continuous-filament
synthetic insulations, the small round PrimaLoft® synthetic fiber
clusters closely to mimic down clusters; trapping heat within small
air pockets to retain warmth.
Independent CLO testing has shown that ThermoBall™ technology can
offer the low weight, loft, warmth, and compressibility of down with
the wet-weather insulating performance of synthetics.
ThermoBall Collection features Thermoball insulation
Phenomenal warmth in cold and
Packs neatly into zipper pocket (not all
styles pack into zipper pocket.)