This Explorer single sleeping bag is an ultra lightweight and compact mummy style sleeping bag. It has a 290 tog micro polyester ripstop shell with a 290 tog polycotton lining and a 225g/m2 single layer goose down filling. This sleeping bag features a 4 way compression sack and a 2 way reversible zip. It has a comfort rating of +3.8 - +8.3, an extreme rating of -10.6? and a season rating of 2-3 seasons.