Summer is arguably the best season to head out of the campsite and into the wilderness with a backpack, and the Mountain Hardwear Ratio Sleeping Bag is arguably the best bag for summer backpacking thanks to its light weight and protective features. ThermoTrap Baffle construction secures 650 fill down insulation in smaller chambers to balance the down evenly across the entire bag, and the down's Q. Shield treatment helps the down resist moisture to retain its heat trapping loft and keep you warm throughout the summer nights. Mountain Hardwear gave the Ratio with a comfort mummy cut to provide a bit more space than standard mummies without adding weight or minimizing warmth. Its dobby shell is durable, and the taffeta lining is smooth to the touch for extra comfort. The down filled face gasket at the hood and the insulated draft tube across the zipper make sure you don't feel a chilly draft throughout the night. The hood features single handed drawcords that cinch it securely around your head with a simple pull.