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SIMIYA Mens Thermals Long Sleeve Undershirt Warm Fleece Lined Base Layer Thermal Tops Long John Shirts for Men

  • Based on 440 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon

Arrives Friday, Feb 20
Order within 17 hours and 28 minutes
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Size: Large


Color: Black


Department ‏ : ‎ mens


Date First Available ‏ : ‎ July 14, 2023


Product Warranty: For warranty information about this product, please click here


Best Sellers Rank: #20,805 in Clothing, Shoes & Jewelry (See Top 100 in Clothing, Shoes & Jewelry) #19 in Men's Thermal Underwear Tops


#19 in Men's Thermal Underwear Tops:


Customer Reviews: 4.4 4.4 out of 5 stars (555)


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Feb 20

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.

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Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews


  • Comfortable
Size: 3X-Large Color: Black
Was very skeptical at first with the material. Kind of like a lycro spandex, feel. But turned out to be a very good product. Soft and comfortable. I recommend going one extra size up for the best possible fit though. Keeps me warmer then the original type of thermal under garments.
Reviewed in the United States on January 20, 2026 by casman

  • Loved it so much bought again right away!
Size: XX-Large Color: 2 Pack Black
Bought again!! Sizingguode is acurate. Very soft, inside and out. Inner layer is like a vey light soft fleece, very warm perfect by itself or as a layer, it’s thin lightweight feel is an added feature, so perfect bought more sets!!!
Reviewed in the United States on January 29, 2026 by Cheryl Lambert

  • Fits as described, stretchy fabric.
Size: XX-Large Color: Black
I bought this to wear under a sweatshirt and over a tee shirt. I bought a xx large. Fits great. I was thinking the shirt would be kinda furry inside because its described as fleece lined,but it was smooth. It is warm,I can say that. And it is very elastic and stretchable. For the price,im happy with the purchase. Cheers! ... show more
Reviewed in the United States on November 19, 2025 by Norm

  • Pretty warm, fits well
Size: Small Color: Black
I am thin and got a small. The fit was somewhat tight which is fine since I wear it as an undershirt. I would say if you are normal or large build consider sizing up unless you want a tight fit. So far it seems to actually be warm for a thin and inexpensive shirt unlike a lot of the Chinese junk on here. I would recommend, especially for a slight build like me. (6'0", 150 lb). ... show more
Reviewed in the United States on January 17, 2025 by Paul Foster

  • keeps me warm.
Size: 3X-Large Color: 2 Pack Black
very warm, they go under the shirt nice and easy. they are made well and they are comfortable.
Reviewed in the United States on December 23, 2025 by Tony Henderson

  • Nice but thin
Size: X-Large Color: Black+grey
I ordered my regular size large and the large I received was a medium. Too small. This is a great thin shirt for those cool but, not cold days. Well made and very flexable. I'll buy a XL next time.
Reviewed in the United States on December 18, 2024 by Brad Bogue

  • Nice fit
Size: 4X-Large Color: Black+grey
Great product
Reviewed in the United States on January 9, 2026 by Amazon Customer

  • Cheap material, don’t suggest
Size: Large Color: Black
Says right in the description it has fleece lining. It is the thinnest polyester material ever and is nothing close to a thermal. Cheap material and misleading description
Reviewed in the United States on January 4, 2026 by Michael S.

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