When every ounce counts, the MSR E-Bivy offers weather resistant shelter and excellent packability for minimalist hikers, cyclists and kayakers. This lightweight bivy bag is designed for the minimalist and to offer protection from wind, dew, frost and even light rain. The Silnylon top is matched with a Durashield-coated base material. Together, they add valuable warmth and moisture protection to your sleeping bag. If packing light is your priority, the E-Bivy weighs in at a mere nine ounces and packs down to a compact 7x4 inches. It's small and light enough to consider as an emergency shelter and paired with a lightweight tarp shelter, the E-Bivy provides portable and versatile shelter for one person. Extend the range of your sleeping bag and protect yourself from light precipitation with the MSR E-Bivy.