Asolo Maggiore 0-Degree X-Static Insulation Anti-Microbial and Odor Eliminating Synthetic Mummy Bag (Red/Grey, Medium) 100% Polyester/ Lining 100% Polyester / Shell 100% Polyester Imported Asolo Gear's warmest synthetic bag, rated to zero degrees Fahrenheit; ideal for year-round use Asolo Gear's warmest synthetic bag, rated to zero degrees Fahrenheit; ideal for year-round use|NULL|Baffle construction, thermal collar, and draft tube keep the cold out; two-way, reversible zipper with auto lock|260T Microfiber ripstop polyester shell and lining; Quadratherm Plus seven-hold polyester insulation; measures 34 by 88 inches (W x D); 4.5-pound total weight|