As summer heat transitions into the unpredictable weather of late August and early autumn, ultra-thin knitwear becomes a functional solution for urban environments. These lightweight fabrics adapt to temperature fluctuations between outdoor heat and chilled office air conditioning. Washing: Use a delicate cycle at temperatures not exceeding 30 degrees Celsius and utilize laundry bags. Pilling: Avoid stiff brushes; use only a delicate fabric shaver/trimmer. Regarding fit: for base layers, select the exact size; for standalone pieces, choosing a size slightly larger prevents overly tight coverage.