










🔥 Elevate your base layer game — warmth and performance that won’t quit!
The FITEXTREME MAXHEAT Men's Thermal Set features premium fleece lining for superior warmth, quick-dry and moisture-wicking fabric for all-day freshness, and 4-way stretch compression fit for enhanced mobility and a sleek look. Engineered with flatlock stitching to prevent irritation, this officially registered brand ranks among the top thermal underwear for men, making it the go-to base layer for skiing, hiking, and cold-weather performance.














| ASIN | B075SYJ8M2 |
| Best Sellers Rank | #67,556 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #7 in Men's Thermal Underwear Union Suits |
| Customer Reviews | 4.4 4.4 out of 5 stars (5,036) |
| Date First Available | November 10, 2015 |
| Department | mens |
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
L**Z
Good
Keeps me warm all day ay work definitely recommend
G**N
Worth the money!
Arrived on time. Fits great and feels so comfortable. You can wear it for pajamas if you want. Good quality. I would recommend this product to a friend.
T**Y
I'm a medium, needed an XL
I'm a medium (5' 10" at 170 lbs semi-muscular) all the time. Based on other feedback, I ordered a large. That was still too small in areas. Top fit well around the waist and shoulders but the sleeves were just too tight. Bottoms were too short (I wear a 33 waist 32 inseem for pants) so getting the crotch correct caused the leg bottoms to come up to my calf. Waist was fine, hip area fine, just the length and tightness around the calf. Recommend ordering TWO sizes above what you would typically wear. Material felt fine and seemed well made for base layers.
C**N
*BIFL ALERT*
BIFL ALERT(or as close as you can for a garment). I have had a pair of these for years and had to get 3 more pairs. I have taken these through the ringer and back. Camping, trout fishing, snowboarding, work,,,it doesn't matter, they have held up. It's $13 for a set!?! I have purchased name brands and spent stupid money on base layers that can't hold a candle to these. A lot of folks reviewing saying they're too tight.... they're base layers, you want them tight dummy. I'm 5'10" a buck eighty, a large fits me perfect. Highly recommend for a solid base layer.
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.
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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