Search  for anything...

WEERTI Thermal Underwear for Men Long Johns Mens with Fleece Lined, Base Layer Men Cold Weather Top Bottom

  • Based on 10,044 reviews
Condition: New
Checking for the best price...
$19.99 Why this price?
Save $20.00 was $39.99

Buy Now, Pay Later


As low as $4 / 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

This item is eligible for return 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 Monday, Sep 15
Order within 11 hours and 25 minutes
Available payment plans shown during checkout

Size: X-Large


Color: Black


Department ‏ : ‎ mens


Date First Available ‏ : ‎ May 13, 2020


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Sep 15

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


  • Good material well worth 25 bucks on a set.
Size: 3X-Large Color: Charcoal
Very soft and warm. Very true to size 3xl is definitely true to size on both top and bottom. I bought for husband and I want the top out of this set... I would give it a thumbs up. Seems to be made well also. KPizzolato
Reviewed in the United States on January 10, 2024 by Katlyn Pizzolato Katlyn Pizzolato

  • Warm and comfortable
Size: 4X-Large Color: Navy
My husband drives truck and rides sxs in the winter in the snow. He needed something a little thicker than what he had. UA brand. These aren't super thick but they are very warm. He is a large guy with a big bottom and these fit great. They are stretchy but don't slid down when he bends over to do chains or what ever. They are thicker than the UA brand and much warmer. He gets hot easy and he says they do not over heat him though. He thanks me for them every time he wears them. He is 6 foot tall wears a 3x shirt and 44x 33 pants, I Ordered the four x size (xxxxl) and they fit great without being too tight or too loose. I will buy again if/when these wear out. The stitching is good I didn't find any flubs. I have washed them a few times and dry on low/ultra low and haven't had any shrinkage problems. ... show more
Reviewed in the United States on December 31, 2023 by Judi, Boise Idaho

  • Worth the price. But wait.. there's more.
Size: 3X-Large Color: Black
Hey potential buyer! I just wanted to drop by and tell you that these thermals are absolutely worth the cost! But before you make your decision, there are a few things you should know. Firstly, they appear to be a 2-layer thing. The inside is made of a softer fleece-like material compared to the outer layer. This is important because it might affect how you clean them. So, make sure to follow the care instructions to keep them in top shape! Secondly, while these thermals are incredibly warm and work wonders, they aren't truly wind resistant. I just wanted to be honest about that because I believe in transparency. But trust me, they'll still keep you cozy on those chilly days! Lastly, these thermals fit snug. So, if you prefer a more relaxed fit, I recommend going a size up. It's always better to be comfortable, right? ... show more
Reviewed in the United States on November 3, 2023 by Justin

  • Happy boyfriend
Size: X-Large Color: White
I got these in a deal for my boyfriend for Christmas. He loves them. Would size up as he is 6’4” 170 pounds and we got the Xl and he said Xxl would be better. Still fit but was short. Super soft on the outside yet warm and fleece lined on the inside. Warm and comfy. Another great buy on Amazon shipped right to the front door. Happy customer!!! ... show more
Reviewed in the United States on January 29, 2024 by Simona Voita

  • Really comfortable
Size: X-Large Color: Charcoal
I'm 6 ft 220lbs and wear 36-38 waist. I ordered XL and they are snug, just how long underwear should be. I've never paid this much for long johns before, but they're worth it. The inside is fleece lined making them the most comfortable I've ever worn. The only downside is because of the type of material they're made from, they get those little lint balls on them. They're more expensive than other brands, but I'll be buying more of them because of how comfortable and warm they are. ... show more
Reviewed in the United States on December 1, 2023 by Vicki

  • bought a second set immediately
Size: X-Large Color: Black
i can no longer buy my preferred union suit (from another vendor), so i took a chance on these. they're incredibly soft and fit well (i'm about 5 foot 7 inches and 200 lbs, most of it belly) and they certainly keep me warm. the only downside is that they want to be washed in cold water, but i can forgive that. i was so impressed that i bought a second set so i have something to wear while the first set is in the wash. hey, it's cold here! ... show more
Reviewed in the United States on December 19, 2023 by Amazon Customer

  • comfy!
Size: X-Large Color: Charcoal
i found cheapest best under wear to keep warm ..i have itchy skin alot and these are comfy! great stuff! shirt aliitle tight on me .. 6 2 195 but hve some mscle
Reviewed in the United States on October 21, 2023 by Breakin Stuff

  • Comfortable
Fit good, soft but my waist band started coming unstitched after 2 washes.
Reviewed in the United States on January 10, 2024 by Pduke

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...