Thermal Top

Polar King

8 reviews Write a Review
172.10 XLR
9.50 (in)
1.83 (in)
11.50 (in)


Stay warm and comfortable during the coldest days with our Men's Thermal Underwear Shirt. Utilizing advanced Polar King technology, this shirt is crafted from a super-soft blend of 50% cotton and 50% polyester, ensuring both warmth and comfort. Designed to be paired seamlessly with our thermal underwear bottoms, it provides full coverage and an effective barrier against the cold.

This men's thermal top features a classic crew neck and knitted cuffs, which help to retain heat and provide a snug fit. The 9 oz fabric is durable and cozy, making it an ideal base layer for outdoor activities in cooler weather. Grab yours today!

  • 50% Cotton / 50% Polyester, 9 oz Fabric
  • Crew Neck
  • Knitted Cuffs
  • Poly Bag Packaging

    8 Reviews

  • Posted by Charles Minks on Jan 3rd 2023


    Thermal top

    Good product and like the fit. Will likely do a reorder for a second one

  • Posted by Rod Taylor on Dec 22nd 2022


    They are supper. And Last

    When you drop the thermostat to 60 . you will stay warm.

  • Posted by Up North on Jan 24th 2022


    Thermo Top

    Greatly undersized. Recommend ordering two sizes up. My 2X is a medium at most.

  • Posted by Darren Carpenter on Dec 13th 2021


    Thermal tops

    My XXLT tops are much smaller than the Henley in same XXLT size. Otherwise, another stellar Key product.

  • Posted by Jesse Jones on Nov 17th 2021


    Runs very small

    This shirt runs very small, which is surprising compared to other shirts I have purchased from Key Apparel. I would say that these shirts run two sizes small. I usually where a Large Tall and that is a little too long. I tried a Large in this shirt and it fit like a medium. I re order an XL and that was too small as well. I don't know if I will bother trying a 2XL, because you have to pay postage on returns.

  • Posted by Drew Cooper on Nov 1st 2021


    runs small

    Well made. Heavy enough. Tight, though. Consider buying a size larger.

  • Posted by Ervin simon on Nov 12th 2020


    Thermal top

    It was a little small for a5xl

  • Posted by B. Teague on Jul 27th 2020


    Best long johns

    These are well made. Nice thick elastic waist band. Heavy weight material.