Features of the NEMO Men's Ramsey 15 Sleeping Bag Introducing mummy bags that incorporate the most popular Features from our Spoon shaped sleeping bags Better than a standard mummy bag with NEMO's Thermo Gill Technology for an Upper hand in temperature management You can unzip the vents to let warm air escape if you get too hot at night Waterproof/breathable footbox and hood protects the bottom and top of your bag from tent wall condensation and keeps you toasty warm Blanket fold provides a comfy material around your face for snuggling or adjusting the heat retained in the bag and allows for tucked-in comfort just like your bed at home