Things might look like pure decoration - bows, rosettes, bustles, thick shapes, flounces and swathes of fabric, but this is very clever pattern cutting with complex shape built into the nature of the garments.
See the full collection on style.com
...and if you are in London over the holiday you should call in to Dover Street Market, a Comme des Garcons stockists - here you can see (and try on!) how the catwalk outfits sit alongside their slightly more subtle "sisters". The workmanship and quality of fabric and manufacture is just exquisite.