Based on Ed Viesturs' specifications for a compact, light, strong, expedition tent, the EV 3 is designed for the rigors of high altitude mountaineering. The EV 3 shelters three persons, has a trim design to fit on ledges, and its clip set-up aids high-wind pitches. TX07 PU fabric - a lightweight, strong, non-stretch laminate - stabilizes and strengthens when pitched, and Atlas Scandium XL poles add sturdiness while shaving weight. Interior zip and built in ventilation help frost management while integrated vestibule provides protection from the elements.