





🔥 Elevate your base layer game — warmth and performance that won’t quit!
The FITEXTREME MAXHEAT Men's Thermal Underwear Long Johns Set features premium fleece lining for superior warmth, quick-dry and moisture-wicking fabric for all-day comfort, and 4-way stretch with flatlock stitching for a sleek, irritation-free fit. Designed for active professionals who demand both style and function in cold weather, this set is ideal for skiing, hiking, and everyday winter wear.














| ASIN | B017SJK76C |
| ASIN | B075SYJ8M2 |
| Age Range Description | Adult |
| Apparel Closure Type | Elastic |
| Best Sellers Rank | #331,268 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #7 in Men's Thermal Underwear Union Suits |
| Brand Name | FITEXTREME |
| Collection Name | Winter |
| Color | A Sporty Set_black |
| Customer Reviews | 4.4 4.4 out of 5 stars (5,065) |
| Date First Available | November 10, 2015 |
| Department | mens |
| Fabric Type | 92% Polyester, 8% Polyurethane |
| Fit Type | Stretch |
| Manufacturer Part Number | LYSB017SJK76C-SPRTSEQIP |
| Material Type | 92% Polyester, 8% Polyurethane |
| Neck Style | Crew Neck |
| Occasion Type | Hiking,Sports |
| Package Quantity | 1 |
| Pattern | Solid |
| Size | Small |
| Sleeve Type | Long Sleeve |
| Style Name | Soft |
| Style Number | LYSB017SJK76C-SPRTSEQIP |
B**G
Comfy and Warm - Fit Well
Got these for an upcoming ski trip and immediately tried them on when they arrived. I am getting another pair now. Im 5"10, 170lbs, so pretty average size. Medium fits me perfectly. They are bit snug (which i want for a base layer) and very comfortable. The neck/collar is a little big, but no different than some of the v-neck style shirts today. The exterior has a spandex/lyra feel while the inside has a microfeecy kind of feel. They feel a bit thicker than a regular base layer and seem to be pretty warm. Will write an update after my ski trip and getting to use them in the wild, but I am pretty impressed thus far! 01-31-20 02-23-20 Returned from my ski trip. These are great! I got a 2nd pair after my previous post. These are warm and comfy and layer well. It was -11 for several days and I was fine with these and thin/waterproof shell pants on my bottom half. For my top half, I layered with a light performance jersey and light wind breaker with an outer shell. I never felt cold. I wore these as my base layer for 2 days of active skiing and they didnt stink after removal. No issues with stitching or quality thus far and i have washed them now a few times. These seem like a great base layer for a wide range of winter temps!
D**I
Warm but Runs Small
Extremely warm and comfortable—perfect for my trip to Alaska. Note that it runs small, so I recommend ordering one size up for the best fit. High-quality material and well-made, keeps you cozy in freezing temperatures
I**N
Sizing difference makes a real good set worse
I am a 6'1 220 lb guy and i ordered a Large based on the waist measurements. The bottom of the set is wonderful! The material is stretchy and soft and it seems to keep heat pretty well, but when in a warm environment it doesnt run too hot. They also fit really well.I would def get a Large bottom of this set again. My issue is the top. The neckline is weird, it seems to go down my back more than i would like. I am fine with how low it is but it seems cut weird. The sleeves are really small too. They ride up on my arms a lot. The chest is pretty tight and the shoulders are real tight. The material is soft and comfortable though, and i could see myself wearing it if the fit works. I will try to order the set seperately next time. and getting a Tesla also to compare
J**S
Best Base Layer on the Market (not for Dad bods)
For everyone concerned with the size let me clear it up. I am 5ft 8 185 and the large (m100) for me perfectly! These long underwear are meant and should fit very tightly, like a wet suit. They also create warmth by you moving around. Thats how they are designed. I wear them under a cross country racing suit on extremely cold -10 to -20f and after the first mile I am toasty warm. They may feel cold when you first go outside but that’s ok start moving! They are also NOT designed for a “dad bod” . So if that’s your body type I would suggest a thicker and looser long underwear. If you are a x-ski racer, alpine racer, winter runner, fat biker or winter hiker I would highly recommend these long underwear. I live in MN where winter temps can be brutal and these are my go to base layer every time.
D**S
It works as expected and I love it
I bought both the top and bottom and I love it. Specifically I like that it fits tightly and comfortably (better then other thermal underware I bought ~10 years ago), I like the soft internal layer and the different feel for the external layer, I like the design (the stripes) that allowed me to put a t-shirt on top of the top and wear it to semi-public spaces - it did not feel like an underwear, and the most important - I provided me the thermal insulation: I used it on my sail passage from Seattle to San Francisco in September (it was quite cold up there in the ocean this September), and I am looking forward to wear the set during my skiing trips, so I definitely recommend (and already did) the product, and the only wish I have is that they make this product for kids.
C**N
XL - Almost big enough
I'm a 6' 2" 200lbs office worker, so I ordered the XL size. It almost fits, the sleeves and legs both are about 1" short, which I can live with. It's the tightness on the front of my neck that I cannot live with. The material is great, nicely warm. I've got Carhartt thermals and I like the fabric on these better, even if the construction on the Carhartts does seem a bit better. If I had to pay and an extra 2 or 3 dollars for the few sq inches of material it would take to make these fit perfectly, these long johns would be a great deal. As it is, I'm going to be sending them back.
K**V
Fits well
I have two other brands. These seem to fit the best and feel great.
J**R
Excellent thermals
These thermals are great. They are well made with quality material that is comfortable against the skin. They dry out quickly, so there is little to no accumulation of moisture. I have been using them in temps of 32F to 55F under a t-shirt and with a light jacket on the lower end of the temps. They make a great base layer. Even though they fit snuggly, they are very elastic and allow freedom of movement in all directions. They fit a little snug, so if you're on the edge between sizes I would go larger. I have one pair of L, and they fit tight but not uncomfortable. I have another top in XL and it is a little snug but as it should be. The XL is also noticeably longer in the torso. I definitely recommend these. They are pricier then some others, but the quality is very good. The
A**Z
لم استلم الا الفنيله السروال غير موجود
M**4
Para el precio está muy bueno
G**R
Need to improve and should have front opening part for human needs
J**H
quiet warm
S**.
TIENEN EL AJUSTE PERFECTO PARA SER ROPA TERMICA, ADEMAS DE QUE SI SON BASTANTE AISLANTES DEL FRIO, PUEDO ESTAR PERFECTAMENTE CON UNOS PANTALONES DE MEZCLILLA Y NO HAY FRIO.
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2 months ago
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