Mountainsmith El Diente 5 Degree Sleeping Bag:
Down filled mummy sleeping bags offer the best warmth to weight ratio, and the Mountainsmith El Diente 5 Degree Sleeping Bag uses 650 fill Power Duck Down and box baffle construction to keep you warm down to 5°F. The relaxed mummy fit is combined with a form-fitting, adjustable hood, a full-length draft tube and a neck baffle collar to make sure you stay warm and sleep well in cold weather. The El Diente sleeping bag meets the new European Norm (EN) rating to 10°F. Mountainsmith includes a water-resistant compression stuff sack and a cotton sack for longer term storage.