The Yupik were masters of warm clothing for arctic climes.

Far north, the coats would be very tight fitting in winter, to keep body warmth close. In more southern zones, the coats would be looser, to enable the wearer more flexibility in movement, and to permit some cooling as needed.

One material often used in coat construction was puffin skins - the fine and dense feathers would be left on and the pelts stitched into the body of the coat/parka. Puffins were easy to obtain, and joined the pelts of warmly-furred mammals, when those were available.

Construction demonstrated a high level of skill.