Assertion: bivy sack | /r/CapableOf | form effective barrier
Facets:
value: against rain
type: TRANSITIVE-OBJECT
value: against wind chill
type: TRANSITIVE-OBJECT
Source sentences:
text: A bivouac sack will usually have a thin waterproof fabric shell that is designed to slip over a sleeping bag, providing an additional 5 to 10 °C of insulation and forming an effective barrier against wind chill and rain.