Pack or skip
Packable down jacket for Busan in January
Verdict
Pack it
Lows around 33°F — the packable puffer covers 90% of layering needs.
Why
Busan in January averages highs of 45°F, lows of 33°F, 6 rainy days.
That climate means a packable down jacket earns its space in the bag. Lows around 33°F — the packable puffer covers 90% of layering needs.