Made with patented USA Aeris Inside

Active Rewarming Insulation

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Proven Single Layer Technology

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Patented USA Insulation

POWERED BY AERIS INSIDE TECHNOLOGY

STAY OUT LONGER

Stay Out Longer with Fortress Clothing™: Powered by USA-patented insulation for unmatched warmth and comfort, no matter the conditions.

Baselayer Tops

Best baselayers in the world

BasePro Pant - Fortress Clothing

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BasePro 1/4 Zip - Fortress Clothing

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BASEPRO PANTS 2.0

Featuring our all-new and improved BasePro Pants, now crafted with a lightweight, more durable fabric and powered by USA-patented insulation for unmatched warmth and comfort in any condition."

BASEPRO FULL-ZIP

BasePro Full-Zip, crafted with lightweight, more durable fabric and powered by USA-patented insulation for unmatched warmth and comfort in any condition."

BasePro Full - Zip - Fortress ClothingGlacier Jacket - Fortress Clothing

Single Layer > 3 ordinary baselayers

Replace up to three ordinary baselayers, offering superior warmth, moisture management, and comfort in extreme conditions with our advanced USA PATENTED insulation technology. Designed for simplicity and performance, they eliminate the need for bulky layering while ensuring reliable protection and flexibility.

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Glacier Jacket

The Glacier Jacket offers the world’s best weight-to-warmth ratio, thanks to our innovative Aeris Inside Technology, providing unparalleled performance and comfort in any condition -10˚F to 60˚F

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