An igloo, also known as a snow house or snow hut, is a type of shelter built of snow, typically built when the snow can be easily compacted. Although igloos are stereotypically associated with all Inuit, they were traditionally associated with people of Canada’s Central Arctic and Greenland’s Thule area.
Other Inuit people tended to use snow to insulate their houses, which were constructed from whalebone and hides. Snow is used because the air pockets trapped in it make it an insulator. On the outside, temperatures may be as low as −45 °C (−49 °F), but on the inside the temperature may range from −7 °C (19 °F) to 16 °C (61 °F) when warmed by body heat alone.