Why did kwakiutl use animal hides and cedar bark to make clothing?

Oh, dude, the Kwakiutl used animal hides and cedar bark to make clothing because, like, animal hides were durable and provided warmth, while cedar bark was flexible and could be woven into intricate designs. Plus, it's not like they had a mall nearby to pick up some new threads, so they had to work with what they had.