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Designed for blockbuster mountaineering explorations in frigid, unforgiving conditions, this insulated jacket keeps athletes warm in cold weather at high altitudes thanks to its lightweight PrimaLoft® One insulation. This Summit Series®; jacket keeps explorers dry too thanks to its waterproof, highly breathable, seam sealed HyVent® Alpha fabric that retains its capabilities in even the most severe conditions.
A waterproof, breathable technology utilizing a polyurethane (PU) coating that consists of a tri-component, multi-layer formula for waterproof protection, moisture permeability and durability. HyVent® technology has been lab- and field-tested to ensure the best possible durability and function while also maintaining an optimum level of breathability. To test the level of waterproofness, we subjected HyVent® garments to 20 wash cycles, where garments retained an average of more than 60 PSI on the waterproofing Mullens test.