SockPro 1.0
Size Charts
MALE | SIZE |
SMALL | 5-6 |
MEDIUM | 6-8 |
LARGE | 8-11 |
XL | 11-13 |
FEMALE | SIZE |
SMALL | 5-7 |
MEDIUM | 7-9 |
LARGE | 9-11 |

Not sure what is the right shoe size for you? Look at Quick Detailed sizing in description
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Continue shoppingMALE | SIZE |
SMALL | 5-6 |
MEDIUM | 6-8 |
LARGE | 8-11 |
XL | 11-13 |
FEMALE | SIZE |
SMALL | 5-7 |
MEDIUM | 7-9 |
LARGE | 9-11 |
Not sure what is the right shoe size for you? Look at Quick Detailed sizing in description
Fortress SockPro
The world's first insulated sock, featuring patented Aeris 250 ½ insulation throughout. Our advanced design maximizes heat retention while comfortably compressing inside any shoe or boot, making it the warmest sock available.
Pro Tips for Ultimate Warmth:
PLEASE NOTE: For those with sensitive feet, we recommend wearing a thin wool or Merino non-cotton sock as a first layer under the SockPro. This additional layer will enhance comfort and provide an irritation-free experience, as interior seams may sometimes cause discomfort.
Seen on Shark Tank
Appeared on Shark Tank Featuring USA PATENTED insulation technology that replaces bulky layers while providing warmth and moisture management. The Sharks were impressed by the brand’s potential.
Learn moreSingle Layer Technology
Versatility: Suitable for both mild and extreme cold conditions
Patented Technology: Ensures innovative and reliable performance
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USA Patented Insulation
Stay warm and dry, no matter the conditions, with reliable performance even when wet
Free shipping over $50 USA
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Explore Fortress Clothing’s innovative gear, designed for ultimate warmth and protection. Featuring patented USA-made insulation, our products keep you warm even when wet. Shop with confidence—free shipping on orders over $50
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Best base layer I’ve ever bought.. Very happy with it. Used it recently to go snowboarding and it felt great; light and comfortable. I used it under a light running windbreaker and it worked great. I was warm and dry the entire time. Temp at the mountain was between 15F and 40F, and at times, under the sun, I even opened the wind breaker and base layer zipper to cool down.. can’t wait to teste it in colder weather.
I am 6”1’, 205lb, and the size L fit perfectly, not too tight and not too loose. It’s not too thick or puffy, so no trouble wearing sporty fit wind breaking layers on top.
Saw the base layer and coat at an Outdoor Show in Denver just before leaving on a trip to Iceland in January. Could not pack much and sales guy convinced me I could leave my base layers at home and my bulky parka and be warm and dry the whole trip. Shipped to my house in two days and off I went. I figured I would buy some base layers if it didn't work out. Turns out the sales guy was totally solid!! I was so warm and dry out hiking on the glaciers, ice caving, and even whale watching on the boats during a super windy rainy trip when everyone else was shivering inside. Its not bulky at all and packs so light! Even when it was snowing and raining I truly did not notice being cold. I'm ALWAYS cold per my husband and even he remarked I did not complain once about being cold the whole trip. Its the best investment I have ever made!!
So I order 3 of these baby's and everyone loves it not o e complain ,all comfortable and super warm no need for extra stuff ,got it for my wife ,and 2 daughters
Super warm ,super comfortable,i ordered 2 for me and my son and we both love them I'm 5 10 215 lbs I got a xl fit great
The quality looks really solid. Fits like a glove, definitely order the size up. Thankfully I did like it recommended. The hood is entirely way too pointy, so I’ll never wear the thing cause it’s literally like a coned triangle on your head which looks absolutely goofy. But very light material, and surprisingly warm. I’d definitely order other stuff from them. They threw in some free sock pros with my purchase and those are literally worth their weight in gold! Amazing!
We bought this coat for our son who is serving a mission in Canada. It isn’t bulky, keeps out the wind chill and keeps you warm. I’m not sure what more you could ask from a coat. Also the price point is significantly less then all of the other coats we looked at that can handle a Canadian winter.
Best base layer I’ve ever bought.. Very happy with it. Used it recently to go snowboarding and it felt great; light and comfortable. I used it under a light running windbreaker and it worked great. I was warm and dry the entire time. Temp at the mountain was between 15F and 40F, and at times, under the sun, I even opened the wind breaker and base layer zipper to cool down.. can’t wait to teste it in colder weather.
I am 6”1’, 205lb, and the size L fit perfectly, not too tight and not too loose. It’s not too thick or puffy, so no trouble wearing sporty fit wind breaking layers on top.
Previously ordered a quarter zip BasePro and very pleased but the full zip version is even more versatile as can be fully unzipped as you warm up. Fabulous quality and worth every penny - to me worth the postage cost to the UK.
These products are quite remarkable - just the one layer does it in ANY UK cold weather (which is far from extreme).
I don't like the 'Made In China' and the sizing is way off. I take and XL so I ordered a 2XL as / website instructions, and it's way too small to fit over my base pro. So I would need to have a 3XL which is 2 sizes larger than I take. I live in Canada, so I got charged an additional $42 for duty on top of the exchange rate and shipping charges. So almost $200 CAD for a wind breaker is crazy.