Assertion: sleeping bag's warmth | /r/CapableOf | stay within the bag
Facets:
Source sentences:
text: Neck collars are perfect sleeping bags for cold conditions as they ensure the warmth stays within the bag by ensuring heat doesn’t escape from the sleeping bag.
text: Neck collars are perfect for a warm lightweight sleeping bag as they ensure the warmth stays within the bag by ensuring heat doesn’t escape from the sleeping bag.