Search  for anything...

LAPASA Men's Thermal Underwear Top Crewneck Long Sleeve Shirt Base Layer Lightweight Midweight Heavyweight Winter M09/M26/M55

  • Based on 6,181 reviews
Condition: New
Checking for product changes
$27.99 Why this price?
Holiday Deal · 30% off was $39.99

Buy Now, Pay Later


As low as $6 / mo
  • – 4-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout. Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

Eligible for Return, Refund or Replacement within 30 days of receipt

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: In Stock.
Fulfilled by Amazon

Arrives Tuesday, Dec 24
Order within 22 hours and 18 minutes
Available payment plans shown during checkout

Team Name: Thermoflux 100 Lightweight


Athlete: 2 Pack


Size: Medium


Color: Black 2 Top


Department ‏ : ‎ mens


Date First Available ‏ : ‎ March 13, 2023


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Dec 24

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.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Loyal to LAPASA layers
Team Name: Thermoflux 200 Midweight Athlete: 2 Pack Size: Small Color: Light Grey 2 Pack
I bought my first LAPASA base layer set based on reviews saying they were the warmest layers ever. I live in Ohio and man does it get COLD here. I'm talking 0 degrees Fahrenheit at times in the winter. True to what reviewers said those 300 thickness sets were the warmest thing ever and SO warm and comfortable. I decided to come back and buy a couple of these shirts in the lighter weight for when I just needed a little added warmth under a sweatshirt. These are perfect for that. They are true to size but do not fit super tight like some base layers and I happen to prefer it this way. If you want them tight, you could size down but do be aware than when sizing down you will lose length and this does matter if you're taller. I like that these are very soft and comfortable on the inside but smooth on the outside so they don't cling to whatever you wear over them. Nice flex to the material, neither flimsy nor constricting. Great for working, hiking, or doing other activities outdoors that involve a lot of movement. Absolutely worth every penny. Highly recommended. ... show more
Reviewed in the United States on January 15, 2024 by sbonne

  • Easily the best choice for a shirt that keeps you warm and isn’t bulky. Also soft and cozy.
Team Name: Thermoflux 200 Midweight Athlete: 2 Pack Size: XX-Large Color: White 2 Top
Female 38. 5”8 245lbs. Bought 2X Sorry it’s been 2 years, I rarely write reviews but I just dug this out the attic and omg where has this been all my life? (Other than the attic). Someone with autoimmune conditions and can get hot in a matter of seconds and then ice cold I can say this sweatshirt is my new best friend. It’s lined with warmth but still pretty thin comparatively. It’s shape fitting so it hugs you in all the right places. It’s soft inside and out. I wore it 2 years ago in Montana where it’s cold and it was an under layer. No complaints. I live in Florida so naturally this thing went into the attic. Found it in holiday decor and put it on bc we’re having a short cold snap. It’s amazing, thin and soft but still double lined, fleece on the inside. Didn’t shrink much in the wash. Price was about the same as other thermals but this is by far better than any other thermal shirt I’ve ever owned. And no I didn’t get any incentives for leaving this review. Will purchase multiples. Wish there are more colors. ... show more
Reviewed in the United States on October 8, 2023 by shayna lingebach

  • Super warm...2nd one and ordering a 3rd
Team Name: Thermoflux 300 Heavyweight Athlete: 1 Pack Size: Medium Color: Black
I bought one 2 years ago, but 100% forgot I bought it. I was much bigger then and it was huge...since dropping almost 60 lbs I bought another one to fit snug and close...mainly to wear under bicycle jersey in 30 degrees days. Its silky and warm. Im 5ft 10in When I was 249 lbs 2XL fit good and a little loose...like a traditional sweat shirt. Now at 195lbs a Medium fits snug but very good...close and super stretchy...exactly the fit I wanted...similar fit as picture in ad. ... show more
Reviewed in the United States on January 14, 2024 by Vonstallin

  • The material is thick but one of them after the first wash it got faded...
Team Name: Thermoflux 100 Lightweight Athlete: 1 Pack Size: Large Color: Light Grey
I bought this 2 tops because the wave of cold that hit Georgia. I was excited. I wore and I felt warm. They are thick enough to do the job. one of them, (camouflage design) after first wash, it lost its color (FADED) also I see lint on it now. The other one is made of different material looks good and yes it's think. I am disappointed with the camouflage one but I will keep wearing it because it keeps warm. The look is gone. ... show more
Reviewed in the United States on February 4, 2024 by Louai Drissi

  • Very nice thin base layer!
Team Name: Thermoflux 100 Lightweight Athlete: 2 Pack Size: Medium Color: Black 2 Top
I really liked these a lot so much so that I went a ordered another pair in white. These are thin and breathable, but nice and warm if used as a base layer. By itself you may not find it warm because of the polyester fabric, but under another shirt (how I use them) they are surprisingly warm for their weight. The product is extremely light, stretchy and in fact has a brushed fleece inner that feels nice on the skin. It is not a double layer polyester thermal just a single layer which is brushed underneath. I purchased my regular size and the fit was spot on with the arms definitely long enough to extend to my wrist and stretchy enough to be snug and not restrictive. Also worth mentioning is that my neck holes were of normal circumference and not super wide like some others have stated, maybe they've improved that with these later runs. All in all a great, thin and lightweight thermal that works great as a base layer. I would definitely buy again if needed. P.S; they also machine washed and dried without issue, but the tag states to hang dry.... ... show more
Reviewed in the United States on January 29, 2018 by PJ

  • Comfortable
Team Name: Thermoflux 100 Lightweight Athlete: 2 Pack Size: Large Color: Light Grey 2 Pack
This is comfortable and thin but keeps you warm.
Reviewed in the United States on February 20, 2024 by R. C. Fontaine

  • Perfect under work shirt
Team Name: Thermoflux 300 Heavyweight Athlete: 1 Pack Size: X-Large Color: Dark Grey
My husband works in a cold office (57 degrees) and needs extra warmth under his work shirts and this is perfect! Snug fit so it doesn't add a lot of bulk, just warmth. Great value for the money.
Reviewed in the United States on January 19, 2024 by not aging gracefully

  • Perfect warmth
Team Name: Thermoflux 200 Midweight Athlete: 2 Pack Size: X-Large Color: Black 2 Top
Edit: I still love these tops, but after one wear, they are pilling pretty severely . 3 stars because the pilling is very noticeable. I have been looking for the perfect fleece lined tops, and these are them! Got the medium warmth. They are the perfect thickness, the outside fabric does not pill like others I have tried, the sleeve length is good, and they are not too tight or loose. Win-win all the way around. I even got the 2-pack, and am considering another set so I can get rid of all the other ones. ... show more
Reviewed in the United States on January 25, 2024 by CM CM

Can't find a product?

Find it on Amazon first, then paste the link below.