The Extreme Jacket: Made in the USA ( -35˚F to 50˚F) Layer System: Fortress Clothing uses a patented insulation with an outer shell to repel wind and water, and the extreme layer to trap heat and wick away moisture. Insulating Materials: High-quality patented insulating materials such as synthetic fibers and specialized fabrics are used to retain body heat effectively. Moisture Management: Insulation are designed to wick moisture away from the skin, keeping you dry and comfortable. Windproof and Water-Resistant: Many garments are windproof and water-resistant, providing an additional barrier against the elements. Durability: Fortress Clothing is known for its durability, ensuring that its insulating properties remain effective over time. Layering Options: The clothing is designed to be a Mid-Layer, allowing you to add providing flexibility in staying warm with this layer and a shell. Materials: Full Dual Head YKK Center Front Zipper Patented AERIS ™ 500 Insulation Technology (½" / 13mm of loft) 2 Insulated Hand Pockets Adjustable Draw Cord at Waist Lower Side Slits for Ease of Movement Materials: – 100% Polyester Mesh Lining – 100% Polyester Micro Rip-Stop Taffeta with DWR Finish Weight 30 oz Dimensions 12 × 12 × 3 in SIZE XS, Small, Medium, Large, XL, 2XL, 3XL