Sleep warm all night long with the Omni Core Designs Ultra-Lightweight Multi- Down Mummy (-10F to 30F) Sleeping Bag. To make the best ultralight mummy sleeping bag, we know we have to cram as many features and benefits into the smallest and lightest form factor. At just about 4 lbs. to 5 lbs. this sleeping bag assortment has been independently tested following the European Norm (EN) 13537 Testing Protocol making it one of the most comfortable and warmest cold-weather mummy sleeping bags around.

READY FOR EXTREME WEATHER: we use independent 3rd party testing labs to validate the -23.3? to 0? temperature range conforms to the European Standard (EN13537). If you're more of a comfortable sleeper (i.e. shorts, t shirt), then aim to sleep in temperature's about 20-30 degree's warmer than tagged on the bag