After a day full of adventure you lie back on your camping mat listen to the crickets chirping and enjoy the balmy summer night you are neither too warm nor too cold your lightweight jack wolfskin pounder xt down sleeping bag sees to that you can even zip this summer sleeping bag bag right open spread it out and use it like a bed cover if you want the pounder xt 6 has a white duck down fill which makes it very light and packable it s the ideal sleeping bag for warm summer nights and lightweight