Race to Zero is an ultralight packable system built for running 5km or 5 days straight. There are six pieces in the system – a short and long sleeve t shirt, shorts, jacket, puffer and vest. Each piece is built with advanced materials, packs down into itself and fits into the palm of your hand.

With super-compact synthetic insulation that’s compressed down to a third of its normal size, and massive zipped side vents that cool you down, the Race to Zero Puffer Vest is a highly versatile layer built for any adventure. While insulated vests are normally constructed with big puffy baffles to keep the insulation in place, the vest is constructed with continuous sheets of insulation anchored down with stitched bartacks to reduce weight, bulk and the potential for cold spots. The outer shell and inner lining are made from an ultra-lightweight, recycled nylon engineered to be the same thickness as silk. The vest repels water and wind, and it weighs just 196 grams.