Heat Retention: Reflects up to 70% of your body heat to help prevent heat loss and provide critical warmth during cold nights. A dependable layer for emergency preparedness or alpine adventures. Water Resistant: Designed with highly water-resistant fabric and an integrated hood to protect against light rain, dew, and unexpected moisture. Keeps you dry when conditions take a turn. Breathable Design: Unlike traditional emergency bivvies, this breathable fabric reduces condensation by allowing moisture to escape, keeping you warmer and drier inside. Versatile Function: Use it as a sleeping bag liner for added warmth, an ultralight summer sleep system, or as a compact emergency bivvy when the unexpected happens. Lightweight & Compact: Weighs just 5.5 oz. and packs down easily to fit in a backpack, glove box, or emergency kit—perfect for hiking, trail running, or fastpacking. Specifications: Dimensions: 82 x 32 inches Weight: 5.5oz