When you're braving the bone-chilling temperatures on McKinley, anything less than 799-fill down is simply unacceptable. Fortunately, The North Face Catalyst Micro Down Jacket is packed with water-resistant 800-fill down, so it's ready for anything. When worn under a waterproof shell, this packable, insulating jacket keeps the cold out and your body heat in so you can keep moving through the challenging conditions. Once the storms abate, this featherweight hooded jacket unobtrusively holds off the cold on its own.
Natural down is the warmest, lightest, and most compressible insulation available, but when it gets wet it clumps, stops insulating, and takes a long time to dry. The North Face uses an exclusive water-resistant treatment to solve this problem. 800 WRD, the down used in the Catalyst jacket, stays dry 17 times longer than untreated down and maintain 100% of its loft when wet. The North Face also included FlashDry panels under the arms to move moisture away quickly, and since the Catalyst stows neatly into its own pocket, it's perfect to stick in your pack even if the weather looks like it's going to hold.
The athletic fit makes it easier to layer a shell over the Catalyst for really cold weather. The North Face finished the Catalyst with two zippered hand pockets and a chest pocket, elastic at the cuffs to comfortably seal out draft, and a low-profile cinch cord at the hem that allows you to customize the fit.