Northern Outfitters® patented insulation technology, known as VÆTREX™, has revolutionized extreme cold weather clothing. VÆTREX™ stands for Vapor Attenuating and Expelling, Thermal Retaining insulation for Extreme cold weather clothing. VÆTREX™ is soft, pliable, hydrophobic, hypo-allergenic, and very efficient at retaining body heat. Unlike other insulating materials, VÆTREX™ has permanent loft and will expel body moisture. Northern Outfitters® clothing provides the best possible cold weather protection.

Total Body Moisture Management - The insulation and fabrics in our clothing are designed to perform like the fur and feathers on animals found in extreme cold regions. In addition, the warmth of VÆTREX™ insulated clothing is not degraded by perspiration. Moisture vapor in the form of perspiration is attenuated away from the body through the fabric, and is then expelled into the outside atmosphere. Other clothing insulation systems encourage body moisture to condense in the garment, which dramatically decreases its useful warmth. Another important feature of VÆTREX™ is its ability to handle external moisture in extreme cold.