Serious cold requires serious warmth. Packable, light, and efficient, the Nuclei SV is our warmest synthetically insulated belay parka. Varying layers of Coreloft™ insulation are strategically placed to provide maximum warmth while keeping weight down, and the light, tough Arato™ 15 shell is breathable, windproof, and repels light moisture. Three external and two internal pockets keep essentials at hand, and the helmet compatible StormHood™ protects without impeding vision.

Size and Fit Tips: Regular Fit - Our classic fit is cut comfortably throughout the chest, waist, hip, and thigh. It allows freedom of movement, provides shape, and layers comfortably over our first layers. This model's fit has evolved. Be sure to double-check our new sizing charts before checkout.