Men's ColdGear® Reactor Fitted Long Sleeve

Style # 1298251
Height: Size: Fit: Fitted
Mens ColdGear® Reactor Fitted Long Sleeve
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Height: Size: Fit: Fitted
Men's ColdGear® Reactor Fitted Long Sleeve

Product DNA

The baselayer that solves the problem of either being too cold when you start working out or too hot as you get going. ColdGear® Reactor actually adapts to what you're doing by dumping heat as you pick up speed.
  • Fitted: Next-to-skin without the squeeze
  • ColdGear® Reactor adapts to your activity level for the right breathability & warmth for what you're doing
  • Fabric has soft, brushed "nodes" next-to-skin for the right warmth that breathes as you move
  • 4-way stretch construction moves better in every direction
  • Material wicks sweat & dries really fast
  • ColdGear® mesh side panels
  • Shaped hem & articulated cuffs
  • Reflective logos
  • 84% Polyester/16% Elastane
  • Imported

Review Summary

6 Reviews
67% of reviewers recommend


Runs small Runs large


Min. Max.


Min. Max.

Great wardrobe add!

I purchased this top a few months ago and it is great and performs wonderfully. I wear it under my Swacket on cool run days, shovelling and walking. It feels great, almost like second skin really. Wicks sweat well, dries quickly and I recommend this product.

Totally different design

After buying the green coldgear long sleeve top I was disappointed to discover that the product displayed and the product recieved were two totally different designs with the logo placed on the arm as opposed to the shoulder as shown in the pictures as well as the logo at the back of the neck being grey as opposed white, as well as this once I opened the packaging I was shocked to find marks/footprints on the top, these did come off however indicate the product had been kept on the floor before being shipped. Unfortunately I couldn’t have another sent out or have a refund arranged because I had an upcoming event.

Love the improvements

I bought this top as a base layer to complement an older version that I’ve had for two years. My primary wish was to use this for golf but I also took it to the Alps over Christmas where it was my base layer of choice. It fits beautifully and the side panels performed well. It’s so comfortable that I forget I’m wearing it.

Fitted reactor top

Absolutely love this top. Fits in all the right places, from the comfort of the neck to the way it fits around the chest. A really nice piece of clothing

Base layer review

Quality product. Purchased for winter golf as base layer. Very comfortable and stretch negates any restrictions on the golf course. Certainly reduces the need for heavy outer layers. Used as one of UA layers in the winter.

A fitted top thats great for cold weather runs

Im 182cm (5 11') tall and weigh 80kgs (176 lbs), I do quite a lot of weight training on top of running and I normally buy large in UA gear; this top runs true to size. Its 'fitted' but certainly not tight like a compression top. In terms of warmth, I dont like to wear too many layer on my runs, I've worn this top for runs on 2-4 degrees celcius days with no other top layer and Ive been very warm. Its perfect for wearing outside during activities like running or team sports training but Id certainly say you'd need an extra layer during the winter if you were doing something like walking or golfing. In terms of aesthetics, the top looks better in person, theres a subtle cross hatch texture in the fabric that is not visible in the pictures. So it doesnt look smooth like UA compression tops (which it looks like in the pictures). All in all I highly recommend this product and intend to pick up two more in other colours myself.