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BasePro 1/4 Zip

 First Layer (technology)

Manages all moisture (works when wet)
-5°F to 70°F
AERIS 250 Insulation Technology (¼” / 6mm of loft)  92% Polyester / 8% Spandex 4 way Stretch 1 Sided Brushed Polyester
  • Designed to be worn closest to the skin, under other layers of clothing.
  • Made from moisture-wicking fabrics and insulation that pull sweat away from the skin, keeping you dry and comfortable during physical activity.
  • Provides an extra layer of insulation during colder weather, or wicks away moisture and allows for ventilation during warmer weather, helping to regulate body temperature.
  • Close, comfortable fit that allows for freedom of movement while providing support and compression where needed.
  • Some baselayers are treated with antimicrobial agents that help prevent the growth of bacteria and reduce odors caused by sweat.
  • Made from a variety of materials including synthetic fabrics like polyester and nylon, as well as natural materials like wool and silk.
  • Helps to enhance overall comfort and performance during physical activity in a variety of weather conditions.
Weight 16 oz
Dimensions 12 × 12 × 3 in
SIZE Small-3XL

Customer Reviews

Based on 48 reviews
John Martinez
Simply Wow!

I met Dale and Devan at the Shot Show. Wow! These guys were very helpful and informative about the Fortress Gear. Enough so, I bought almost every item they were selling. It's the warmest and most comfortable clothing I have ever worn outside and it keeps you surprisingly comfortable inside. You won't be disappointed!

Greg Fitzgerald
BasePro was the bomb!

I recently used the BasePro 1/4 Zip, top and bottom, on summit night and for sleeping at night on Kilimanjaro. For the weight it was the smartest article of clothing I brought. Simply put, you get what you pay for! I can't wait to use it on other hikes, hunting, snowmobiling, skiing and especially ice fishing. Heck, I may even wear it around the house in the winter, it's like thermal pajamas on steroids. :)

Ben G
Does the Job Very Well

This is the perfect base layer. It's thin where it needs to be so when working hard your body can breathe and get moisture out, but then has the insulation in the right spot so when you're in the cold and not moving a lot it keeps you very warm.

Rich Samoska
More than a polertec and GREAT customer service.

I own Polartec top and bottoms and I’ve used it for over 20 years, a friend introduce Fortress clothing to me 12/21/22 I bought the top and bottom, and it is amazing! to say the least. Watch the Fortress video it is true.
I received them from Utah to Connecticut in three days. Great customer service too!

Cliffy C
Nothing I have compares for warmth as a base layer

Used this bit of kit in the Lake district of UK. I only needed a jacket to stop the wind as the Base Pro kept my torso nice and cosy. The only problem I had was I am small around the chest. If there was an XS I would have ordered that one. Without the jacket the S rides up on me and I feel like the Michelin man. I think the SF troops should be issued this kit for cold climates.

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