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Become the first human polar bear—wear Helly Hansen Prowool.

Helly Hansen's Freeze Half Zip Turtle baselayer top combines supersoft Merino Prowool and hollow T3 polypropylene for ultimate warmth and legendary LIFA moisture management. The bi-component knit of the Freeze puts the insulating wool on the outside to disperse outgoing moisture and create a lofted micro-midlayer, while the smooth, hollow polypropylene fibers against your skin transport sweat 40 times faster than polyester and trap heat using T3 Thermic Tube Technology. On cold winter runs, this top is all you need to keep warm and dry, and as a baselayer it stands up to freezing stop-and-go activities without ever feeling clammy, stuffy or itchy. In the spring, you can even wear the Freeze Half Zip under a softshell and leave your fleece at home.

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Warmth for the Cold

  • Familiarity:I've used it several times
  • Fit:True to size
  • Height: 6'5"
    Weight: 225 lbs
    Size Purchased: XL

I sometimes this as an outer layer for cold morning mountain runs. I've also used it a good amount (though I usually go with the non-zippered option) during the ski season as a base layer. It is super warm and breathable.

Warmth for the Cold


  • Familiarity:I've put it through the wringer
  • Fit:True to size

This is one of the first HH pieces I ever got, and I have been wearing it for at least five years, several times per week from September - May. It layers well with other lightweight tops and is snug enough to wear under a mid-layer jacket and such.

The picture is a bit weird, I admit - I'm using supplemental oxygen for a training session on rollerskis; but, the weather is a cool 45-50 degrees F and with just the Freeze top I'm totally comfortable. When the temp drops another 15-20 degrees I just throw on a training jacket and it still works great.


No joke about the human polar bear.

  • Familiarity:I've used it several times
  • Fit:Runs small

Although the item runs a little small I would say, I'm regularly a medium and the medium I received fits but is skin tight, it is well worth the buy. I rock this as my sole baselayer underneath my jacket when I'm boarding up at snowbird and on spring weather ski days, it even gets a little hot. But never fear, the 1/2 zip top will keep everything cool. Outside of super warm days I found that is breathes incredibly well and is great for running in the winter too. I have so far been thoroughly impressed with the baselayer overall and would suggest if you're looking for a heavy baselayer, this should be on your top three list.


Warm and comfortable

  • Familiarity:I've used it once or twice and have initial impressions
  • Fit:True to size

After reading all the reviews and hearing so much about how small HH fits, I decided to go with a large. I am 6' 2" 183 lbs and a large is what I wear in under amour clothing. This fits very similar, so I would have to say that they are not skin tight but they are tight enough to be on your body like a base layer should be. This was one of the most comfortable baselayers I have ever worn. I skied with this while in Canada when it was below zero and it was perfect, I did not need a mid layer and all I had was my jacket shell over it. The shirt did wonderful, furthermore it was comfortable to wear around town afterward. I never sweated and when I did get hot it was not unbearable. I would highly recommend this as a baselayer.


Warm and comfy

    I got this in medium, in spite of some reviews that said it ran small. I find it fits perfectly (I normally wear medium, and my measurements correspond to the medium in the size chart). It is nice and warm when zipped up. I wore it under a Pendelton wool shirt and ski parka in 0 F windy weather. When the weather warmed up, just unzip it for some breeze flow.

    It is soft and not at all itchy.

    Unanswered Question

    When will you have this item in XL size?

    When will you have this item in XL size?


    Uber warmth

    • Familiarity:I've put it through the wringer

    This base layer is waaaaaaaaaaaaay warm! A nice form fitting layer that has never bunched on me or even moved up my arms a bit while climbing. I knew HH put out a top notch product but hesitated because of the price. I'm so sorry I waited, I could have had several HH products for the price I wasted on cheaper stuff. No more penny pinching on gear for this guy!


    Very warm.

    • Gender:Male
    • Familiarity:I've used it once or twice and have initial impressions

    I used this on a 20F bike ride as a base layer & it appears to be very warm & keeps you dry. The large fits like a large should & is quite comfortable. Excellent quality like HH normally is.



      I'm a big fan of any outdoor clothing that use merino wool. It wicks moisture well and it doesn't hold funky smells. This top delivers with an athletic cut, top notch comfort and superior wicking than merino wool alone. Should have ordered another one.


      Nice but too small.

        I'm giving this shirt 4 stars because it appears to be a well-made product. Can't really speak for the performance since I didn't keep it. I wish I had read the reviews before I ordered. This thing isn't just tight, it's SMALL! Very small in the shoulders, chest and arms. I'm 5'11" 185 lbs with a 34 inch waist and I ordered a Large. It was snug, but acceptable in the waist, but tight to the point of discomfort in the chest and under my arms. I tried to zip it up and thought I might asphyxiate.
        Rather than mess with trying a size up, I'm just going back to a Smartwool Large which fits me perfectly.

        The Importance of Baselayer

        The key to staying warm is staying dry and your choice of baselayer technology is where staying dry begins. Check out this video to learn the importance of baselayer.

        Helly Hansen HHWarm Baselayer

        See how the benefits of LIFA next to skin and a layer of merino wool on the outside of this baselayer offers superior moisture management and the added benefits of warmth from wool for resort ski days or low intensity winter activities.


        comfortable but tight

          The material is 57%merino wool and 43%polypropylene,it is comfortable and breathable .I think it is nicer than 100%merino wool.
          Keeping you warm but not muggy and also not itchy.
          The shortcoming is too tight if you depend on the sizing guide.Original sizing guide would be more correct for you.


          Warm and Dry

            Another great suggestion from Backcountry's sales team. I asked my salesman for a suggestion on long underwear and he suggested this item from personal experience. That's what I like about this company - they hire people that know from personal experience what works! This garment is well made and performs beautifully. Thanks bc.c


            HIGHLY Recommend

              Similar to the Charger, the Freeze is thicker and a different material than Lifa. I plan to wear this one primarily when the temperatures really drop in the next few weeks and the snow starts falling. A bit pricey at the moment, but if the price fell anymore, I'd buy them all up!


              Cold Be Gone

                One of the best super warm baselayers I have had the pleasure of trying. The fabric is so nice, no itch, no binding, almost like a second skin. The sweat you work up from that 20 minute skin up from the lift is wicked away super fast, keeping you dry. The minus 30 celsius days are not an issue, this is great under midlayer and shell.



                  If you've never been a fan of wool because it was itchy and didn't move well... this is leaps and bounds better, but it'll still irritate. I finally had to wear a layer underneath. Also wears on the small side and rides up in the pits. I'd suggest 1 size larger than what you normally get. Otherwise, warmth to weight ratio is super.


                  Dynamite. Freeze.

                    I am so glad I got this on sale so I could afford to get two. Dig this, I am running outside, it's a partly cloudy 30 degrees. I have on a base layer tshirt, a base long sleeve, both are thin and spandexy, and the Freeze. I'm out 40 minutes, On the home stretch, I look to my right because something shiny or white catches my eye. It's FROST on my shoulder!! The thing was wicking and warming so well the sweat froze on my shoulder and upper back but I was still warm as pie. I say, 'Get it'.


                    Best ever.

                      Absolutely best top I own. Versalite enough to be a baselayer or a solo top that is very warm. Keeps you dry and wicks sweat so fast you can see it bead up or mist off of you. Truly enjoy putting this on every time.
                      In Japan on a long trip, I wore this to run in and it didn't require washing until after 4 or 5 runs. Very strong moisture management and anti-microbial performance.

                      Does this top have the thumb holes in the cuffs?

                      Would this be good for a man who works...

                      Would this be good for a man who works outside? Also, use it for snowbroarding

                      Yes and yes. Puttin' the ROAR back in snowboarding.