As its name suggests, this kit is meant to handle the toughest weather conditions on Earth, like those you’d find ransacking lines in Alaska’s famed Chugach Range. Both garments feature Gore-Tex three-layer construction for ultimate breathability and moisture protection. Additionally, both pieces are fully seam taped and the bib can be cinched tight to block heat from escaping when bone-cutting cold persists. For milder weather, core vents located on the torso, rather than the pits, help cool you down. The bib has large thigh pockets and the jacket boasts mega-oversized pockets, as well, ensuring storage won’t be an issue.