www.columbia.com, two pounds
‘Tis the season for warm-weather camping. But as we all know, the warmth doesn’t always carry deep into the darkest, coolest parts of the night, which is why the Reactor 35 is such a find.  Rated to 35 degrees, it’s ideal for conditions when the temps are guaranteed to not drop below freezing. That said, the bag is plenty warm; the mummy shape fits snugly; the trapezoidal footbox tapers in from the hip width to reduce the internal dead space that would otherwise take energy to keep warm, but the fit allows for room in the shoulders, so it doesn’t feel claustrophobic, even when zipped up for maximum warmth. The two-way zipper provides plenty of venting, and you can also stick your feet through the bottom vent for when your dogs need some air but you still want heat on your torso. And on nights when the cold surprises you, the hood drawstring cinches down for additional warmth The bag also has a small stash pocket for glasses, iPod, or chap stick and a small flashlight—nice if you’re sleeping under the stars rather than in a tent. The bag weighs in far less than similarly rated synthetic sacks thanks to Columbia’s Omni-Heat reflective technology; small silver dots made reflect body heat back to your core like the iconic space blankets, while the spaces between the dot-matrix pattern lets the bag breathe and keeps things from getting clammy. The zippers have also been configured to let you “mate” two sleeping bags to create a really big bag for families with small tykes, couples, or simply campers who like a bit extra room. The soft, fluffy Thermix insulation kept its loft after a year of solid testing, and stuffs down to the size of a football, making it ideal for late spring and summer backpacking trips.
Comes in regular and long lengths