100% Polyester Imported Therm-a-Rest’s top-rated Saros 20F/-6C synthetic sleeping bag offers lightweight warmth for three-season comfort while camping and backpacking EraLoft synthetic fill insulation is efficient, compressible and water-resistant using hollow fibers to reduce weight without sacrificing warmth With Additional Room for Multiple positions (W.A.R.M.) fit means it allows for various natural sleep positions while maintaining thermal efficiency SynergyLink Connectors integrate the bag with a pad for optimal efficiency and comfort; Zoned Insulation maximizes warmth and saves weight Regular measures 80x31.5x4.5 inches, fits heights up to 6 feet, packs to 9.5x10.5 inches, and weighs 3.19 pounds; storage sack and compression sack included