Designed to be worn under a hard shell in the mountains, the ORTOVOX Swisswool Piz Segnas Jacket provides warmth and moisture control that we can trust. The SwissWool insulation in the core and shoulders situates this jacket as one of the warmest insulators offered by ORTOVOX, while slightly less insulation in the arms and on the sides ensure that you can move comfortably through the alpine. With that warmth comes overheating, or at least it would come if it weren't for the TEC-STRETCH face fabric that breathes well to keep us cool and handles abrasion with ease.