Traditionally, sleeping bags have come in two shapes: rectangular bags that are roomy but not as thermally efficient (lots of dead space to keep warm). And traditional mummy-shaped bags, which are warmer and more packable, but can also leave you feeling—well—mummified. Now there’s a middle ground: Nemo’s new Spoon Series Sleeping bags, which have added width in the shoulders, taper down to the hips, and then flair back out at the knees. Even the bags' baffles are designed to curve to the shape of your body. Nemo kept these bags light and claims the design still maintains thermal efficiency. We are excited to see how warm these bags stay when we test them—and for the opportunity to escape the sarcophagus when camping next year.