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Conditions can change by the hour during all-day outdoor exploration, but you'll be prepared for anything with this 3-in-1 layering system that delivers best-in-class protection in wet, cold conditions. The heathered, waterproof exterior shell with stretch shields a warm, zip-in liner jacket that's insulated with our new, ultralight ThermoBall™, powered by PrimaLoft™ clusters at the core and PrimaLoft® sleeves for versatile warmth.
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.