The North Face Assault FUTURELIGHT Bivy Sack

The internal DAC Featherlite NSL pole creates a small arch over your head and shoulders. This lifts the fabric off your face, which significantly reduces that claustrophobic feeling and allows for better airflow while you sleep.

Yes, FUTURELIGHT is a nanospun membrane designed specifically for high air permeability. While no bivy is completely immune to condensation in extreme humidity, this material is far more effective at venting moisture than traditional waterproof coatings.

It packs down to 9.5 by 5.5 inches. It is designed to be highly compressible, so it should easily slide into the bottom or side pocket of most alpine climbing packs without taking up significant space.

The floor is constructed from 40D nylon ripstop with a silicone coating, which is quite robust for a lightweight shelter. However, if you are camping on sharp granite or jagged scree, using a thin footprint or piece of Tyvek underneath is still recommended to extend the life of the fabric.

This bivy is versatile enough for three-season use and light winter conditions. Because it is a single-person shelter, it relies on your body heat to stay warm, so ensure your sleeping bag is rated appropriately for the temperatures you expect to encounter.

Yes, the dual-direction zipper is a key feature for temperature regulation. You can unzip it from the top down to create a vent near your face, which helps manage airflow and moisture buildup without exposing your entire body to the elements.