Big Agnes - Gunn Creek 30 Sleeping Bag with Insotect Hot Stream Fill TECHNOLOGY TO ALWAYS KEEP YOU WARM: Insotect Flow is a flow-optimized insulation system that delivers uniform heat distribution and natural body contouring through its revolutionary baffle design. Its advanced body-heat management system rapidly transfers heat from the core of your body to your extremities for uniform warmth and comfort. ALL THE SPACE YOU NEED: The brilliantly designed Free Range Hood increases ability to lift and move head even when zipped and the vaulted foot box creates more wiggle room for your feet. MADE FROM RECYCLED MATERIAL: The Gun Creek 30 is made from 100% recycled polyester insulation and with DownTek down it will keep you warm throughout the night. EXTRA STORAGE: Mesh storage sack, nylon stuff sack and exterior loops for hang drying or storage. THE MOTHER OF COMFORT: The outdoors arent just where we get away, it's where our stories are made. Based in the Colorado Rockies, Big Agnes creates innovative solutions that help you get outside, go further into the backcountry, all while being fun and comfortable.