The Blaze series sleeping bags are constructed with a durable polyester ripstop shell with a soft polyester liner and are filled with synthetic TechLoft Silver insulation. TechLoft Silver insulation consists of multiple denier staple-length fibers that have a siliconized finish for maximum insulation loft and compactness. The Blaze uses two-layer off-set construction featuring a contoured hood and mummy shape which help seal in your warmth. For added heat retention the Blaze boasts an insulated chest and zipper baffle keeping the warmth in and the cold night air out. The Blaze is offered in multiple sizes and temperatures to accommodate most people. The Blaze is a great bag to add to your camping essentials. TechLoft Silver insulation Two-layer offset construction #8 separating zippers Insulated chest and zipper baffle Polyester ripstop outer fabric Polyester liner Standard stuff sack