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Boys can stay outside longer in wet, cold conditions thanks to ThermoBall™, powered by PrimaLoft®, our new synthetic technology featuring small round clusters that trap heat to retain warmth. This lightweight jacket offers exceptional thermal insulation and can be stowed in its own hand pocket for versatile winter protection during outdoor activities.
Developed in partnership with Primaoft, Inc., ThermoBall is a revolution in insulation technology. Unlike traditional continuous-filament synthetic insulation, 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 warmth equivalent to 600 fill goose down. As a result, ThermoBall can offer the lightweight warmth and compressibility of down with the wet-weather insulating performance of synthetic insulation.