For all seasons, Elizabeth Daingerfield Zwicky wrote me a little while back, in recommending a Wooly Mammoth fashion plate (in wool) from the “Autumn / Winter 300,000 years ago collection” by Ruby (rubyetc_) on Instagram (where she identifies herself as “lllustrator, artist, big silly”); Ruby’s full set of mammothwear:
In wool, but also in linen, latex, and tulle (fashions for all tastes)
From NOAD:
adj. woolly (US also wooly): 1 [a] made of wool: a red woolly hat. [b] (of an animal, plant, or part) bearing or naturally covered with wool or hair resembling wool: woolly gray-green foliage | the woolly aphid. [c] resembling wool in texture or appearance: woolly wisps of cloud. …
Hence the name of the (now-extinct) wool(l)y mammoth (Mammuthus primigenius), which was covered in warm fur.