The Quest rain jacket from The North Face is a jacket with DryVent technology, not HyVent. The jacket is made from two-layer DryVent material, which is waterproof, windproof and breathable, with a durable water-repellent DWR coating. DryVent is the successor to the older HyVent coating and offers improved breathability and waterproofness. The left sleeve is therefore labelled DryVent, not HyVent.