Waterproof Shelter for Solo Mountain Travel The Alpine XT Bivy is built for solo mountain travel, delivering waterproof, breathable protection and comfort in rugged, unpredictable mountain conditions. Constructed with Pertex® Shield Air fabric and fully seam-taped for durability, the Alpine XT Bivy is newly updated for 2026 and offers exceptional weather resistance and airflow to minimize condensation through a passive ventilation flap. An extra-large mesh screen allows for stargazing and ventilation, while a high-volume toe box adds sleeping comfort. The easy-access side opening streamlines entry and exit, and the single DAC aluminum pole design with included stakes ensures stability and quick setup when the situation demands it.