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Developed in partnership with PrimaLoft, 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 Clo testing by Kansas State University has shown that ThermoBall has equivalent warmth to 600 fill goose down. As a result, ThermoBall can offer the low weight, warmth and compressibility of down with the wet-weather insulating performance of synthetics.

5 products