Summit Series

Summit Series™ represents the pinnacle of outdoor product technology, design innovation and athlete testing. We design this collection to keep our athletes warm, dry and safe in extreme environments and engineer product based on their feedback in the field. This collaboration results in the strongest, lightest gear available that’s built for summit success.

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Thermoball

Thermoball

Developed in partnership with Primaloft, 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.

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