LIKE NEW Stylish Men’s XS Arc'teryx puffer vest. Worn once. Exceptionally light and warm, the Cerium Vest is ideal insulation for backcountry minimalists. Easily stashed in your pack, it’s instantly available for core warmth as a midlayer in cold, dry conditions or a standalone during rest breaks or at camp. Fits TTS and in perfect condition, just don’t wear it. Retails for $300.