Fortress Clothing insulated jacket in a snowy mountain landscape

ADAPTIVE WARMING INSULATION

WARM LIKE DOWN. WORKS LIKE WOOL.

Technical warmth built with patented USA-made AERIS™ insulation. Lightweight warmth that keeps working when wet.

REAL PEOPLE. REAL CONDITIONS.
WARM WHEN WET
LIGHTWEIGHT
USA-MADE AERIS™
BUILT FOR COLD

AERIS Technology

THE INSULATION THAT MADE IT ON SHARK TANK

Patented AERIS™ insulation delivers lightweight warmth that keeps working when wet—without the bulk.

How AERIS works

Designed To Work even if soaking wet

USA MADE AERIS brings purpose-built materials and considered construction together for reliable cold-weather performance.

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Cold-weather apparel in a winter landscape

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START WITH THE RIGHT LAYER.

Built for cold conditions, engineered for movement.

BASEPRO SERIES

ONE BASEPRO. REPLACES 2–4 LAYERS

Forget the bulky layers. BasePro replaces 2–4 thermal and mid-layers with one lightweight, flexible layer that keeps you warm—even when conditions change.

SHOP BASEPRO
BasePro crew
BasePro pant
BasePro outdoors
One system. Ready for whatever the forecast brings Wet Or Dry

Less bulk. More capability.

Base layer
Mid layer
Insulation
Shell
One BasePro system
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Spend 50$+ = free USA Shipping

EASY RETURNS

Using Redo Exchanges and Returns

180-DAY GUARANTEE

For All Manufacturing Defects

CUSTOMER SUPPORT

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INSIDER PICKS

FORTRESS TEAM FAVORITES

These are the Fortress products our team reaches for most. Tried, tested, and trusted by the people who know our gear best.

Hybrid Hoodie - Fortress ClothingEMPLOYEE FAVORITE

Hybrid 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.”
Polar Puff - Fortress ClothingEMPLOYEE FAVORITE

Polar 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.”
Ultra-Light Vest - Fortress ClothingEMPLOYEE FAVORITE

Ultra-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.”
Women's Arctic Jacket - Fortress ClothingEMPLOYEE FAVORITE

Arctic 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”
BasePro Crew - Fortress ClothingEMPLOYEE FAVORITE

BasePro Crew 2.0

Recommended by Matt J
“I wear the BasePro Crew with almost every jacket I own. It’s perfect for work, fishing, snowmobiling, or just getting through cold days. What I love most is not having to worry about whether I’m wearing enough layers. With BasePro and a jacket, I’m comfortable from around -15°F to 65°F, depending on the jacket and conditions. As the temperature drops, I already have the layer I need underneath. One BasePro + your jacket = simple, warm, and ready for whatever the weather brings.”
Glacier - Fortress ClothingEMPLOYEE FAVORITE

Glacier

Recommended by Felisha D
“I don’t like heavy jackets, but I hate being cold—so the Glacier is one of my favorites. It’s incredibly warm while still being lightweight and easy to wear. It’s not a super heavy-duty jacket, so for serious cold-weather activities, I’ll pair it with my Hybrid Hoodie. But for hiking, shopping, traveling, or getting in and out of the car, the Glacier is perfect. It’s warm without feeling bulky, which is exactly what I want in a jacket. My fit: 5'8", 155 lbs — I wear a Medium.”