RemixIconEx.System.arrow_down_s

You're seeing just the function arrow_down_s, go back to RemixIconEx.System module for more information.
Link to this function

arrow_down_s(icon_css_class \\ "icon")

iex> Elixir.RemixIconEx.System.arrow_down_s()
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" class="icon">
  <path d="M12 13.172l4.95-4.95 1.414 1.414L12 16 5.636 9.636 7.05 8.222z" />
</svg>

example usage

svg.icon {
  width: 96;
  height: 96;
}