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Brighton Base Layer

A seamless, lightweight long sleeve made from an engineered Merino mesh

58 reviews


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Brighton Base Layer

  XS S M L
Chest 30" 32.25" 34.5" 37"
Body Length 24" 25" 26" 26.75"
Sleeve 25.5" 26.25" 27" 28"

From our Customers

58 reviews

Clutch Layer

Our best-selling Brighton Base Layer features an engineered Merino mesh that’s more open around your core, with a closed knit on the sleeves for a bit more warmth in your extremities. We designed it specifically as a training base layer to be worn under a mid-layer or a jacket, but its seamless construction gives it a comfortable, flattering fit that’s not too tight to wear all by itself.



"Soft, breathable, and odor-resistant, the Brighton Base Layer is ideal for cold runs when you need to layer, and can also be worn on its own."

—Runner's World

16.5 Micron Merino Wool Blend
52% Wool, 28% Nylon, 20% Polyester
Constructed Seamlessly To Prevent Chafing

52% Wool, 28% Nylon, 20% Polyester, 16.5 Micron, 145gsm

Machine Wash Cold
Hang Dry

Judi is 5' 8" and wearing a Medium.

The Miracle
of Merino

If you’re still not familiar with the performance benefits of Merino wool, be prepared for a revelation. Stunningly soft and not at all scratchy, Merino wicks moisture and regulates temperature just like animal hair (because it sort of is). It’s almost completely impervious to odor, even if you never choose to wash it. Unlike synthetic wicking materials, Merino stays warm even when it’s wet. And it’s sustainable, too. Our Brighton Base Layer is made from a lightweight, luxurious 16.5 micron Merino blend, and constructed seamlessly to reduce any chance of chafing.

Jeanne is 5' 6" and wears a size Small

Won't Rub You
the Wrong Way

Because the Brighton Base Layer is intended to be worn against your skin, we wanted to eliminate any points of possible irritation or chafing. So we went to Europe and partnered with one of the most innovative seamless factories in the world. The result is a garment built for a level of comfort to rival your favorite pajamas, and a level of performance without any rival at all.

Tsfall18 Long Run Run080665
Sam is 5' 6" and wears a size Extra-Small.
Ts F2017 Women Run 1349
Ts Fall19 Em17565

Iconic Inspiration

Legendary marathoner “Boston Billy” Rodgers once owned a running store on the Marathon course in Cleveland Circle, right before the turn onto Beacon Street, where rowdy Boston College students crowd against the barriers cheering the marathon runners as they head into the final few miles before the finish line. Among the unique articles Bill wore during runs from his shop was a simple mesh layer with polypro jersey sleeves. The idea was that your core generates enough warmth but your shoulders and arms need a little extra protection. Bill’s old fishnet shirt was our inspiration here.

Tracksmith Fw16 2788

Brighton Base Layer