HyVent®: A superior, waterproof, breathable technology utilizing a polyurethane (PU) coating that consists of a tri-component multi-layer formula for waterproof protection, moisture permeability and durability. This technology has been lab tested in The North Face® Quality Assurance lab to ensure the best possible durability and function while also maintaining a comfortable level of breathability. The minimum level of breathability achieved using HyVent® is: 600 g/m2/24 hours on the Moisture Vapor Transfer Rate scale.
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.
In addition to lab testing, HyVent® garments have also been heavily field-tested. The North Face athlete Rick Armstrong, a skier and mountaineer who has many first descents, said, "This technology keeps me out in the storms, catching the best snow long after most people have gone inside."
HyVent® Alpha: A fabric used in the Summit Series® collection, this burly, waterproof fabric utilizes a microporous, hydrophobic lamination technology that retains its capabilities in even the most severs conditions. Its laminate membrane, consisting of nearly half a million holes per square inch, allows perspiration to pass through the jacket before it condenses to liquid; keeping you dry, warm, and comfortable.
HyVent® DT: Using the same principle as HyVent® coating but reducing the thickness of the third layer, this waterproof fabric is lightweight, packable, and more breathable than other unlined treated fabrics. HyVent® DT is created by applying a polyurethane (PU) coating with a DT print matrix which acts as a dry-touch, half-layer coating. The DT half layer adds durability and comfort by physically separating the HyVent® DT PU coating from the skin. HyVent® DT eliminates the need for a liner and is commonly referred to as a 2.5-layer fabric.
HyVent® 3-Layer Fabric: Utilizing a three-layer construction to stay simultaneously breathable and waterproof in extreme conditions, this fabric excels in any exploration. The durable woven outer layer protects the wearer from abrasion, while the mid-layer utilizes a polyurethane coating and micro pores to channel water vapor from the inner layer to the outer, while keeping water out. The comfortable inner layer is also engineered to manage moisture, channeling it up to the micro pores. The end result is a superior waterproof, breathable technology that stays dry inside and out.