North Face has engineered Ventrix to be at the forefront of temperature regulating synthetic fabrics. Activated by movement, the Summit L3 Ventrix Hoodie features micro vents that work to regulate body temperature throughout your climb or tour. For those who spend cold days in the alpine, you can appreciate what it means to effectively regulate heat; it means staying dry and ultimately warm. However, this piece is more than just a revolutionary fabric, it‚s well thought out and functional. The two large front pockets are harness and pack accessible with perforated pockets bags for venting. Cinch chords are hidden in the hand pockets and hood for convenient adjustability and helmet integration. The bottom line is that this piece can handle anything a serious mountain expedition will throw its way, and we love it for it.