Radiator Tee

15 Reviews
  • We crafted these high-performance tees for big mountain riding but they’re so comfortable that you won’t want to take them off.


    • All Mountain
    • Warm Climate
    • Breathable
    • Wicking
    • Durable
    • Polartec


NOTE: We make a newer version of this product. See the Cyclone Tee.

NOTE: Because this product is in the Last Chance Zone, it cannot be returned or exchanged for any reason.

Radiator Tee

The Radiator Tee is our technologically advanced take on the classic warm weather riding tee. Polartec® developed the PowerDry® to have the look and hand of cotton, but perform better than the typical polyester jersey to keep you cool and comfortable. The Radiator Tee also incorporates Polartec’s new, innovative, Delta™ fabric, developed for active cooling, moisture wicking, and on-trail durability. We crafted these high-performance tees for big mountain riding but they’re so comfortable that you won’t want to take them off.

Fabrication & Features

  • Not all base fabrics are created equal, and many can only provide temporary wicking chemistry that fades and weakens with every wash. The Radiator Tee's base fabric is Polartec's Power Dry, designed with Polartec's patented bi-component construction they invented a superior base material that pulls moisture from the skin, expands for faster evaporation and lasts the life of the fabric. Given how much we wash our mtb jerseys, this fabric is ideal for a lot of use and washes. 83% Polyester, 17% Spandex
  • For the venting panels we used the newly developed Polartec® Delta Fabric, also a permanent mechanical wicking fabric that evolves how athletes and adventurers dress for performance in warmer climates
  • Inspired by the design of car radiators, the new fabric is constructed of an optimal base layer that provides wicking capabilities, reduces skin cling, regulates drying and is highly breathable without any chemical treatments
  • Cycling-specific fit is longer in the sleeve and tail to accommodate the rider position
  • Close-to-the body fit aides cooling without excessive flapping
  • 51% Polyester 45% Tencell 4% Spandex
  • Made in the USA (California)


"A couple of months ago I picked up the warm-weather-oriented Kitsbow Radiator Tee and have been riding in it weekly ever since. The Radiator’s unassuming style belies its technical qualities. The Radiator looks and feels similar to cotton, yet is designed to keep riders cooler and more comfortable than a regular old T-shirt...It doesn't creep up my arms or back while riding, because the sleeves and tail are intentionally a little long to maintain proper coverage. As the name would suggest, the Radiator disperses heat and moisture pretty quickly, and kept me as comfortable as possible while grinding away in relentless, mid-day California sun. Having withstood numerous wash cycles without fading or shrinking, the Radiator remains super comfortable and reminds me more of my favorite T-shirt than a riding jersey."

Ryan Cleek
Bike Magazine
Read the full review.

" If the temperatures are mild, the jersey I'll be digging for is most likely to be my Kitsbow Radiator Tee. It looks good, feels ultra comfortable against my skin and it doesn't shout which brand I'm wearing and my preferred riding genre. "

Pinkbike’s Holiday Wishlist
Read the full review.

Check out more cool stuff at steal prices in the Last Chance Zone

Customer Reviews
4.8 Based on 15 Reviews
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Rob C.
United States United States
  • If a garment, please rate the size. Runs SmallTrue to SizeRuns Large
Awesome, and not like anything else

I used this item for a multi-hour ride in Durango recently. I’d been converted to “wool” products before with varying forms of success. Upon receiving the Radiator I was blown away by the overall quality of the product. I rode perfectly - and with no sweaty back from my pack - and thought it was awesome. Thanks for making such great products!

United States United States
Love the color.

I'm wearing it right now! Love the color. I'm a lady who usually wears S or M. I got this in an XS and it was just a teensy bit big on me, but I ran it through the dryer on high and now it's great :D

Chris M.
United States
  • If a garment, please rate the size. Runs SmallTrue to SizeRuns Large
Radiator Tee

Great item! I love the color and fit of the shirt...and it vents really well. Can't wait to try it out in the hot Texas weather this summer!

United States
Dry as a bone 10 minutes after ride was over!!

It was only 65 degrees but I'm a sweater and out of shape here in Kentucky. But the shirt was dry within 10 minutes after my ride!! So we'll see how it does in the summer?? Is also very comfortable!!

Lisa I.
Great Christmas gifts

My son loved the two shirts i ordered for him. Thank you for making gift-giving simple!


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