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ADAPTIVE WARMING INSULATION
Warm Like Down. Works Like Wool.
Serious warmth. Less bulk. More freedom.
Fortress adaptive insulation delivers serious warmth where you need it, without unnecessary bulk.
SERIOUS WARMTH
LIGHTWEIGHT
LESS BULK
BUILT FOR COLD
THE PROBLEM
WHY WEAR 4 LAYERS?
Traditional cold-weather layering adds bulk, limits movement, and makes it harder to adapt as conditions change.
4+ LAYERSMore pieces. More bulk. Less freedom.
THE SOLUTION
ONE SYSTEM. LESS BULK.
Fortress combines essential protection into one streamlined system built to move with you in extreme conditions.
Less bulk
More mobility
One streamlined system
THE TECHNOLOGY
MEET AERIS™
Adaptive Warming Insulation
Adaptive warmth that responds to your body without unnecessary bulk, helping you stay protected and mobile in changing conditions.
Adaptive fiberThermal structureTRAPS HEAT
Retains warmth where you need it most.
ANTI-PERSPIRATION
Helps regulate comfort as activity rises.
LIGHTWEIGHT
Protection engineered without unnecessary weight.
MOBILITY
Flexible warmth that moves with you.
NOT SURE WHERE TO START?
FIND YOUR WARMTH
Find the right protection for your next pursuit, from everyday layers to extreme cold.
BUILT FOR REAL CONDITIONS
Technical layers and dependable gear for the days that demand more.
FIELD TESTED
WORK
Built to keep moving when conditions turn hard.
Explore work gear
BUILT TO ENDURE
HUNT
Protection and performance for long days outside.
Explore hunting gear
GO FURTHER
ADVENTURE
Reliable comfort for every route and forecast.
Explore adventure gear
READY EVERY DAY
EVERYDAY
Technical warmth that works wherever the day leads.
Explore everyday gearREAL CUSTOMERS. REAL RESULTS.
Trusted performance for demanding conditions.
★★★★★
“Warm, dry, and ready for the mountains.”
Alex R.Explore the system
★★★★★
“Dependable protection when the weather turns.”
Jordan M.Shop cold-weather layers
★★★★★
“Technical gear for brutal conditions.”
Taylor S.Find your outer layer
FREE SHIPPING
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EASY RETURNS
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30-DAY GUARANTEE
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CUSTOMER SUPPORT
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QUICK PRODUCT FINDER
HELP ME FIND THE RIGHT PRODUCT.
Answer a few simple questions and we’ll help you find the best Fortress product for your needs, conditions and activities.
NEW LAYER SYSTEM
Replace random layers with one streamlined system.
BUILD MY LAYER SYSTEM
ALL-IN-ONE JACKET
One jacket. All the warmth, all the performance.
FIND THE RIGHT JACKET