Fortress Clothing Jacket Liner

Insulated Jacket Liner

The Fortress Clothing Jacket Liner is a cold-weather insulating layer built to keep you warm under a shell or on its own as a light jacket. It uses Fortress's Aeris insulation, an engineered polymer foam that holds body heat while letting sweat vapor escape, and the maker says it stays warm even when wet. The collarless V-neck sits flat under an outer coat, so it suits hunters, outdoor workers and anyone who layers for the cold.

Features

• Aeris Insulation Core — A 1/2 in. thick engineered polymer layer with an open-cell structure, meaning tiny connected air pockets that trap heat but still let moisture vapor pass through.
• Poly Taffeta Outer Shell — A 3 oz. polyester taffeta face blocks wind while staying breathable.
• Performance Mesh Lining — A 2.9 oz. polyester mesh against the body moves sweat away from your skin and out through the insulation.
• Warm When Wet — The foam insulation keeps working when damp, unlike down, which loses most of its warmth once soaked.
• Two-Way Front Zipper — A full-length zipper with sliders at the top and bottom lets you open the hem for sitting or reaching a belt while the chest stays closed.
• Drawcord Waist — An elastic cord with cord locks cinches the waist to seal out drafts and stop warm air from escaping.
• Two Lower Pockets — Hand pockets at the front hem hold gloves or small items and give you somewhere to warm your hands.
• Collarless V-Neck — The low, flat neckline layers under an outer jacket without bunching at the collar.
• Reinforced Stitching — Stitching is reinforced throughout the liner for durability under heavy use.

Three-Layer Construction

Each layer does its own job. The taffeta shell stops wind, the Aeris core holds heat, and the mesh lining pulls moisture off the skin. Fortress rates the insulation layer to -30°F. The liner is finished in black with Fortress branding on the zipper pull and lower pocket, and it is made in the USA.