DualTemp technology works by combining two different amounts of insulation on the front and back sides of the sleeping bag to achieve two different temperature ratings in the same bag.  For extra warmth, sleep with more insulation on top, or simply flip the bag so it has less insulation on top for use in moderatetemperatures. 

Sized 72 in long x 33 in wide at the top, and 26.5 in wide
at the bottom, the bag is tapered for thermal efficiency and a reduced carry weight. 

Carry weight is 3 lbs 6 oz.  Stuff sack size is 18 in x 9
in.