BasePro Pant - Fortress Clothing
BasePro Pant - Fortress Clothing
BasePro Pant - Fortress Clothing

BasePro Pant

Regular price$129.99
Shipping calculated at checkout.
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-5˚F to 60˚F 
Patented AERIS™ 250 Insulation (¼” / 6mm) traps heat close to skin, maintaining warmth even wet. Design allows full range of motion. Flatlock seams reduce bulk and eliminate skin irritation. Elastic waistband with drawstring/adjustable fit. Anti-odor properties prevent bacteria & odors.
          94% Polyester / 6% Spandex 4 way Stretch 1 Sided Brushed Polyester
Weight 16 oz
Dimensions 12 × 12 × 3 in

XXS , , , , , , 

Patented Technology

About our brand

"With Fortress, you can wear less layers of clothing, and have less weight with a more dynamic temperature range. You can go from it being 50 degrees and jump into frozen Arctic water and have it be 20 degrees or 30 degrees outside and still feel comfortable.
-- Outdoor Media Company Owner

Outdoor Documentary Filmmaker


"The Fortress base layer was a game-changer. It allowed us to film on days that we normally wouldn't have been able to and we could stay out in the cold longer than the camera equipment could handle. That's when I was really sold on it. The battery life in our camera gear couldn’t keep up with Fortress. This is next-level stuff."

No Cold Chills!

"With other clothing, if you exert yourself at all and start sweating, you get cold. Fortress is incredibly unique. When you get wet, you stay warm.”
-- Outdoor Enthusiast



"I get tired of putting layers on and taking them off again. Fortress is
insulating and breathable at the same time, so it keeps you comfortable at a
wider range of temperatures -- even if you're exerting yourself and sweating
in the cold."
-- Peter Smith

Mt. Pleasant Ut

All of the planning, preparation and time it takes to play outdoors is totally worth
it – except when someone gets cold and you have to call it a day. Staying
warm, even when you’re soaking wet, allows you to continue to hunt, fish, camp and ride without having to sacrifice safety.

Mt. Pleasant Ut

"You can think better when you're warm and not shivering and shaking. I've been
out in midwinter -- particularly in directing traffic. You focus a lot on
being cold instead of doing your job. Anytime you're distracted, you're more
prone to making mistakes or overlooking something that's important. I hated
being cold."
-- Police Officer James

Mt. Pleasant Ut

"Fortress Clothing allows me to exert myself in the wilderness and sweat in the winter
time months, and not be concerned that I'm going to die of hypothermia,
versus cotton or any other type of material out there. Fortress Clothing
allows you to mitigate your body moisture, because even when it's wet, it
still heats me up, and I haven't found anything else that can even come
-- Prepper

Mt. Pleasant Ut

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Customer Reviews

Based on 56 reviews
David Viola
Exceeded expectations in a polar vortex at -46F. Awesome base layers!

Outstanding base pants. Exceeded expectations as they kept me warm and comfy in the most recent polar vortex in Canada at -46F! As a Floridian I will never travel to a cold climate again without Fortress winterized clothing apparel. Not bulky and so comfortable. Do yourself a favor and buy Fortress. You will definitely not be disappointed.

Mark Davis
Extreme effective

These base pants, as well as base top, are amazingly effective in the coldest weather. Minus 17 was not match for this tech. Wicks moisture great and temp swings of 40+ remain comfortable.

Never have been warmer in the winter with just two layers on

I finally was able to test the base pro pants and shirt this winter and man what an incredible combo. I took these winter camping with me and wore a regular layer over them (cargo pants and a light sweater).

It was 30 degrees and I was driving with the windows down lol (Keep in mind I get cold easily). I arrived to the campsite and was keeping semi active, cutting timber and setting up camp but stayed warm the whole time with just these two layers on. I actually was able to take off my gloves which I can usually never do because my hands get cold so easily.

Sleeping bag temp was perfect just wearing the base layer. Was actually too warm trying to keep my sweater on (This was about 10 degrees F at this point). Just in the tent and outside of the bag, it was pretty bearable with just the base layer on. Maybe a blanket or my shell layer would of been needed if I wanted to stay out of my sleeping bag for a while.

So yeah, I would go ahead and buy these if you are on the edge of deciding. They pretty much kept me warm until the temperature dropped and the wind started to pick up. I probably could of continued the night with just these on and a wind proof layer.

Robert Vopelak
Keeping Me Warm

Tried these out and put them on fit well. Went outside stood out in the cold North Dakota wind and snow and stayed warm, Oh my these will be great this winter. Why didn't I get these years ago.

Great gear!

So far I love the vest and coat that I bought :).