If you're the type who likes dancing in their sleep, you might want to give the Disco 30 a closer look. NEMO's unique spoon shape gives this bag more room at the elbows and knees, so you're free to roll around, do a little jig, or sleep on your side. And since its filled with down that's hydrophobic, you don't have to sacrifice weight for wet weather comfort--its still light enough to take on week-long backpacking adventures, and won't lose valuable loft should your bladder leak on the trip.