The newly revamped Alpine Bivy for Spring 2019 is 37% lighter than its precursor, the heralded choice for solo winter alpine pursuits. The Alpine Bivy features the seam-taped waterproof performance of GORE-TEX® Respiration Positive™ technology - without collecting interior condensation. A traditional clamshell opening lets you breathe freely without letting in the weather, and a single pole can be used to create overhead space or left at the trailhead to save weight.