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 MIMIC DOWN CLUSTERS; TRAPPING HEAT WITHIN SMALL AIR POCKETS TO RETAIN WARMTH. INDEPENDENT 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 ® HAS THE WARMTH EQUIVALENT OF 600 FILL DOWN.
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