The SOL Escape Bivvy is the first BREATHABLE backcountry emergency shelter. This Bivvy reflects your body heat back to you, but you no longer have to deal with condensation, because the proprietary fabric lets moisture escape, while it keeps rain, snow and wind out! It has waterproof seams, a drawstring hood closure, and side zip, so the outside elements can stay outside. It is extremely lightweight at 5.5 oz., so a great emergency bag for fastpackers, PCT hikers and the like. You can also use it as a liner in your traditional sleeping bag for added warmth, or as an ultralight summer bag!