LAPASA Men's Thermal Underwear Set Soft Fleece Lined Long Johns Light/Mid/Heavy Weight Base Layer Top & Bottom M11/M24/M57
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FREE refund/replacement until Jan 31, 2026
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Availability:
Only 4 left in stock, order soon!
Arrives
Jan 17 – Jan 21
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Special Size Type: Thermoflux 300 Heavyweight
Size: Small
Color: Heather Black
Department : mens
Date First Available : May 17, 2023
Product Warranty: For warranty information about this product, please click here
Best Sellers Rank: #57,297 in Clothing, Shoes & Jewelry (See Top 100 in Clothing, Shoes & Jewelry) #579 in Men's Base Layers
#579 in Men's Base Layers:
Customer Reviews: 4.6 4.6 out of 5 stars (13,194)
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Jan 17 – Jan 21
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Special Size Type: Thermoflux 300 Heavyweight
Size: Medium
Color: Olive Green
First, let me say that, while I ordered a medium, a large with shipped to me. Rather than go through the return, refund and reorder process, I decided to try contacting LAPASA first. A representative replied to my message in the same day, offering to send the correct size straight away or refund the product immediately. The representative, who did supply her name, did not request that I leave positive feedback (or any feedback at all) as a stipulation to receive her assistance. She just acknowledged the problem, offered the solutions and did it in a friendly manner. I chose a replacement. Great communication and resolution. As stated, my info is 195lbs / 6'0" / Size: Medium. I originally ordered the large and it was too loose on me/didn't hug my skin. The mediums fit perfect. I have long arms and legs with a short torso. Even so, the length of both the top and the bottom is good. Although I haven't worn these in very cold weather, the thickness and quality of the outer material is very good. Added to that, the fleece inner material is substantial & soft. These thermals should perform very well in cold weather. Indeed, they do seem to be heavyweight as promised. I will update after testing them in said conditions. For my preference, the thermal shirt could be longer in terms of body length. But it does have sufficient length to be tucked in. I believe this product to be a fantastic buy and my update will be posted very soon, as the weather has just turned, heading towards bitter cold. (I've included two images of the inside fleece material in an attempt to illustrate the thickness and quality. Otherwise, the set looks exactly the same as pictured.)
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Reviewed in the United States on November 16, 2022 by Todd E Astarita Todd E Astarita
Special Size Type: Thermoflux 300 Heavyweight
Size: Small
Color: Heather Black
These were my favorite item last Winter. They are very well made, comfortable, and very warm. If you are planning on sub-zero weather this season don't skimp, get the thick 300 option. A+++
Reviewed in the United States on November 1, 2025 by jeff foster
Special Size Type: Thermoflux 300 Heavyweight
Size: Medium
Color: Dark Heather Grey
My husband loves these. they are so comfortable, and warm, he works outside all day and a lot of nights. He now has 8 pairs and wants more for backups.
Reviewed in the United States on December 13, 2025 by Theresa Grater
When I first opened the box I was surprised to see a nicely packaged product that gave it a real premium feel. The underwear is EXTREMELY comfortable and from the moment I put them on I could feel the extra warmth. The day I bought them I went for a walk with my family and it was about 50 degrees out. I didn't feel like wearing a jacket so I just wore the long underwear under a sweatshirt and jogging pants. I felt very comfortable and the underwear didn't make me too warm. The material is extremely light and soft. It felt like I wasn't even wearing it. The only thing that's preventing a 5 star rating is that the bottoms have a little too much give in the waistband. I'm 5'10" and 180lbs and ordered a large. The top fits nice, but I may end up returning them for a M. I also don't know if they will be good for subzero weather. I'll have to wait to winter to find out.
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Reviewed in the United States on October 18, 2018 by J Ram
The product feels premium. The fit is perfect!
Reviewed in the United States on November 13, 2025 by Tanzid
Special Size Type: Thermoflux 300 Heavyweight
Size: Medium
Color: Heather Blue
I am always cold. If the temperature is below 60F, I start having difficulty regulating my body temperature. I have spent more money on various "warmest rating" outerwear and base layers than I care to think about and nothing seemed to cut the cold of midwest winters...until these. I was so impressed with the performance of these that I now own four sets of the thickest/warmest ones as well as two of the mid-weight shirts for when I need a bit of added warmth but not a full set of base layers. I spent 16 hours insulating an attic while it was 19 degrees outside in just these with a sweatshirt and pants over them and I was never cold at ALL. They're also great for doing outdoor winter projects. Sizing/fit: Across the four sets that I now own, there is some slight size variation but not enough that I would order anything but my usual size. The navy blue set runs a tad short/small but it works just fine. I believe these generally fit very true to size. These have a lot of stretch for ease of movement and don't fit as snug as many base layers do. I like that. If you're on the fence about size, unsure whether to buy your usual size or size up, I would suggest your usual size. Bottom line: if you're on the fence and wondering if this will just be another base layer than makes promises it can't keep, these actually do the job and do it well. GET THEM.
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Reviewed in the United States on December 31, 2023 by sbonne
Special Size Type: Thermoflux 300 Heavyweight
Size: Large
Color: Heather Blue
Warm, very warm. They are so comfortable it’s like putting on warm air.
Reviewed in the United States on December 3, 2025 by BVP
Special Size Type: Thermoflux 300 Heavyweight
Size: X-Large
Color: Olive Green
Needed some thermals for snowmobiling. I am not writing this for Amazon, but writing it for my fellow snowmobilers. Very few reviews I have found for thermals talk about sledding, so here you are. I have tried several and I love these. I don't need to look any further now that I have used them. These are very warm and comfortable. I am 6' 1", 225lb with more dad bod than chiseled bod. I bought XL and like the fit, snug but not stupid tight. I don't feel restricted and forget I have them on. Five below zero with one layer of clothes over, plus my snowmobile bib and jacket, and I was toasty warm at pretty high speed. I tend to go when it is extremely cold, and I am 100% satisfied with these. I would not hesitate to go out at -20 with these as my base layer. After using the heavy weightI added a medium weight set for spring riding. I wore the medium weight on a day that started cold and ended up over 35 degrees and I was uncomfortably warm, felt like I was sweating a lot (drank 4 bottles of water that day) - They performed as promised as I never got soaked in sweat - they really do wick away the moisture - open coat and bibs and stayed dry. I was looking for reviews that addressed these issues for snowmobiler and didn't find much, so here you go, hope this is helpful. I think you can buy these with confidence.
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Reviewed in the United States on February 4, 2021 by PickyBuyer