Go head-to-head with the toughest winter conditions with this lightweight, yet high-performance down jacket.

The Sister Brook II is interchange-compatible so you can adapt to changing conditions even while the jackets funnel neck design, thermal-reflective lining, and 700-fill power down insulation keep you plenty warm on its own while being aided with the use of patented Omni-Heat Infinity that prevents heat loss.
Its also both ruggedly durable (including a 100% nylon Mini Rip-Stop shell) and highly portable (packable into its own custom stuff sack).