The North Face HyVent® technology:

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 est.