As the Inuit spread eastward, they modified their way of life to suit the Arctic environments they encountered. They caught fish and hunted seals, walruses and whales. On land, they hunted caribou, musk oxen, polar bear and other small animals. They used animal skins to make tents and clothes. They crafted tools and weapons from the animals' bones, antlers, horns and teeth. In summer, they traveled in boats covered with animal skin, called kayaks and in winter, on sleds pulled by dogteams. Most Inuit lived in tents in the summer and in large sod houses during the winter. When traveling in search of game in winter, they built snowhouses.

Source:http://collections.ic.gc.ca/arctic/inuit/people.htm