About the technology.  

Ventrix™ is an innovative insulation technology that keeps your body warm without overheating, adapting to movement and regulating temperature. It pairs highly breathable fabrics with laser-perforated, stretch synthetic insulation. 

The insulation is strategically placed in key zones and is anchored using darts, causing the perforations to open and close during motion. These perforations open when you move, allowing excess heat and moisture to escape, and remain closed during rest to retain warmth.