The bag boasts all the features of a quality Snugpak mummy-style sleeping bag but the jumbo zip baffle can be opened out to give much more room within the sleeping bag by opening the expander panel. The extra space within the bag allows air to move around, keeping the bag cooler. And if the temperature drops, just zip the bag tighter and instantly boost the warmth around you. The Chrysalis is the ideal sleeping bag for unpredictable conditions. The compact Chrysalis compresses to a handy pack size, which is great for easy carrying when youre out on your travels. Utilizes Reflectatherm technology where heat is reflected and retained to improve comfort and protection