True to its name, the Uber Light range provides lightweight warmth without the bulk. This jacket can be worn on its own, or as a mid layer, and its lightweight nylon outer has a water repellent (WR) finish that helps repel moisture.650 loft RDS duck down balances compressibility and warmth with ease, and elastic binding on the hem and cuffs trap heat to help keep you warm. The Responsible Down Standard (RDS) is an independent, voluntary global standard in the ethical sourcing of down and feathers. All Macpac down is 100% RDS certified. A 'just in case' down jacket that's light and packable. Perfect for layering when cold weather strikes.