Here's what other sites are saying:
Featuring new highly breathable Polartec(R) Alpha(R) insulation, the men's REI Venturi Hoody Jacket excels when you're hiking hard in cold conditions. Because Polartec Alpha insulation has a more open construction than other "puffy" synthetics, it lets sweat vapor escape to prevent chills when you pause to catch your breath. Polartec Alpha also provides all-conditions warmth and compresses well, so the jacket fits easily inside your pack. The shell material is Pertex(R) Quantum recycled fabric, which is wind resistant to 50 mph and has a durable water repellent finish. Jacket's torso and upper sleeves are lined with mesh to wick moisture and further enhance breathability. Hood and drawcord hem are both adjustable to seal out cold air. The men's REI Venturi Hoody Jacket has 3 zip pockets to secure essentials.
- REI refers to the men's version