LIGHTWEIGHT WARMTH
Warmth designed without unnecessary bulk.
THE NEXT GENERATION OF WINTER WARMTH
WARM LIKE DOWN WORKS LIKE WOOL
Discover lightweight, cold-weather gear powered by USA-made AERIS™ insulation for work and outdoor adventures
FIND YOUR FORTRESS PRODUCT
Explore cold-weather gear built for work, adventure, and everyday performance.
Shop By Temp˚
From cool mornings to extreme winter conditions, find the right Fortress gear for your environment.
Mild cold
20°F to 60ºF
Lightweight warmth for cool mornings, everyday wear, and changing conditions.
Cold weather
-5°F to 50°F
Versatile insulation and strategic layers for cold days at work or outdoors.
Shop Extreme cold
Below -30°F to 40ºF
Insulating layers and cold-weather gear for demanding winter conditions.
Temperature ranges are general shopping guides, not guarantees of comfort at a particular temperature.
MADE IN THE USA
MEET AERIS™ INSULATION
USA-made insulation. Engineered for real-world cold.
Lightweight warmth, less bulk. AERIS™ is at the core of a more considered approach to cold-weather layering.
DESIGNED TO WORK WHEN WET
Explore AERIS™ performance in wet conditions through verified product details.
FEWER LAYERS. MORE FREEDOM.
A simpler approach to getting dressed for cold.
BUILT FOR COLD CONDITIONS
GEAR FOR THE WAY YOU WORK AND EXPLORE
WORK
Insulated clothing for demanding workdays and cold conditions.
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HUNT & FISH
Cold-weather layers and accessories for outdoor pursuits.
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EVERYDAY & TRAVEL
Versatile warmth for commuting, travel, and daily wear.
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Shark Tank Base-Layers
Explore cold-weather clothing one BasePro Layer replace 2-4 traditional layers.
SHOP THE COLLECTIONField tested. Customer trusted.
BUILT FOR THE COLD. TRUSTED BY CUSTOMERS.
“ I slept overnight in just the base layers in temperatures ranging from 20°F to 50°F. My military bag only contained food, water, and basic survival gear, so I had no other clothing or bedding to rely on.” Lincoln O.
BUILT FOR THE CONDITIONS
BUILD YOUR COLD-WEATHER SYSTEM
Start with the right base layer. Add the protection your conditions demand.
Step 01
START WITH BASEPRO
Build your foundation with Fortress BasePro, designed to work as the first layer in a cold-weather system.
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Step 02
Jackets Vests
Choose a jacket, hoodie, or insulated layer to match your activity and exposure.
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Step 03
FINISH WITH THE ACCESSORIES
Complete your setup with pants, gloves, mittens, socks, and the accessories your day calls for.
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