The Nemo Escape Pod 1-Person Bivy Sack - The Nemo Escape Pod 1-Person Bivy Sack is a favorite of minimalists, like kayakers and ultralight thru-hikers, for its ethereal weight and incredibly small pack size. This two-thirds length bivy with a drawstring closure provides bug protection where you need it, without wasting an ounce of weight. Nemo's unique AirSupported Technology (AST) airbeams, or inflatable ribs, weigh hardly anything and pack smaller than traditional poles for the perfect bikepacking solution.