This bag combines all the benefits of down -high compressibility, superior warmth, and light weight- with unmatched performance in the presence of humidity, condensation, and sweat. It will keep you warm with lots of key features. The box baffle construction with ground-level side seams and differential cut maximizes warmth and eliminates cold spots while the top draft collar and zipper draft tube with anti-snag design will keep the cold air out of the bag. The efficient, form fitting hood is warm and comfortable, with captured cord lock for one-handed adjustment, makes it easy to adjust. The bag is also easy to get in and out of with the dual-slider locking zipper. Regular down is treated with a molecular level polymer to create a hydrophobic finish on each individual down plume. This finish allows it to stay dry longer, loft better, and dry faster than untreated down, keeping you warmer in any environment.