USGI ECW OD Sleeping BagThis Extreme Cold Weather sleeping bag from the USA means business they really are extreme. Weighing in at just over 4 and a half kilos, this bad boy is not for your summer hikes and was rated for temperatures as low as 20F (nearly 30 Celsius for kiwi speak)! These thick, lofty, groovy cocoons were issued from the 70's up until around the 2000's keeping troops warm for ages. Featuring the tapered mummy sarcophagus shape for heat retention, these are