15°F and above
MILD COLD
Lightweight warmth for cool mornings, everyday wear, and changing conditions.
Wind Breaker, Cloud Jacket, BasePro layers, and lightweight accessories.
SHOP MILD WEATHER
built with patented USA-made AERIS™ insulation
WARM LIKE DOWN. WORKS LIKE WOOL
USA-Made AERIS™ Insulation
The insulation engineered to keep working—even when wet.
GEAR THAT WORKS
AERIS holds body heat after rain, sweat, and snow. Down quits. This does not. One Fortress layer replaces the stack.
Made in the USA.
Insulation made in America.
Seen on Shark Tank.
A patented insulation built for demanding conditions.
Works wet.
Keeps holding body heat through rain, sweat, and snow.
SHOP BASED ON TEMP
From cool mornings to extreme winter conditions, find the right Fortress gear for your environment.
0°F and above
COLD WEATHER
Reliable insulation and versatile layers for cold days at work or outdoors.
Glacier, Shadow 2.0, Hybrid Hoodie, BasePro, and insulated accessories.
SHOP COLD WEATHER
Below -30˚F to 40˚F
EXTREME COLD
Serious insulation and strategic layering for demanding winter conditions.
Extreme Cold collection, Extreme Jacket, Tundra, Extreme Pants, BasePro, and insulated mittens.
SHOP EXTREME COLDTemperature ranges are general shopping guides, not guaranteed comfort ratings.
Built for the elements
Protection without compromise
Technical warmth and thoughtful design, made for demanding days outdoors.
FREE SHIPPING
Shipping details set by your store
EASY RETURNS
Return terms set by your store
30-DAY GUARANTEE
Guarantee terms set by your store
CUSTOMER SUPPORT
Contact options and hours
FORTRESS INSIDER PICKS
These are the Fortress products our team reaches for most. Tried, tested, and trusted by the people who know our gear best.
EMPLOYEE'S GO TOHybrid Hoodie
Recommended by Mike L
“The best do-it-all jacket in my closet. It fits great and handles work, everyday wear, snow, and rain. It’s my go-to anytime the temperature drops below 50°F, and it keeps me warm down to around -15°F. I love the green color.
My fit: 6'2", 230 lbs — I wear a 2XL. I recommend sizing up for the best fit.”
EMPLOYEE'S GO TOPolar Puff
Recommended by Dale CEO
“Lightweight warmth without the bulk. The Polar Puff is one of my go-to jackets when the temperature drops. It’s comfortable, easy to move in, and great for everything from everyday wear to outdoor adventures in cold weather.
My fit: 6'3", 210 lbs — I wear an XL. I recommend sizing up if you want a little more room for layering.”
EMPLOYEE'S GO TOUltra-Light Vest
Recommended by Devan W
“One of the most underrated products we make. This vest is incredibly versatile and adds a ton of warmth without the bulk.
Layer it over BasePro, a hoodie, or even a long-sleeve shirt. You can also wear it under your favorite jacket when you need extra warmth.
It’s perfect for colder climates when you need another layer, or warmer climates when a hoodie and vest are all you need.
Honestly, one of my favorite Fortress products ever.”
EMPLOYEE'S GO TOArctic puff
Recommended by Becca C
““I love this jacket. It’s light and the warmest thing I’ve ever found. I wore it backpacking through Europe and stayed perfectly warm the whole time. Fortress is the most underrated company that’s been on SharkT.”
5'3" 110 (XS) SIZE Size up if you like to layer”