Men’s Journal aims to feature only the best products and services. If you buy something via one of our links, we may earn a commission. Finding the ideal lightweight jacket can be challenging, be it a waterproof shell to keep you dry in a downpour or a tech hoodie for day-to-day wear . But if your main priority is to stay warm no matter where you're heading, a packable puffer jacket might be your best bet. Thankfully, one of the most widely regarded puffer jackets just had o...