The right layer for chill days and hot workouts The North Face Mountain Sweatshirt Men's Hoodie combines a stretch breathable shell with Ventrix™, the insulation technology that keeps your body warm without overheating. Designed for movement and temperature regulation Ventrix™ pairs highly breathable fabrics with laser-perforated, stretch synthetic insulation to create a layering piece built to shed the sweat so you don’t chill your core. A pop up hood gives you extra cover if you need it, and a full front zip allows you to blow off even more steam. Design and technology put together to create the piece you need when you’re running hot out there in the cold. Any time you’re pushing up the power this provides the right balance of protection and heat dissipation so you can focus on the trail ahead.