Performance starts with a smart base layer.

So we considered skin - the ultimate foundation - and engineered this undershirt to work right along with it.

Fit through Research

We take a research-based approach to fit, starting with a close look at anatomy and biomechanics and then utilizing technology like strain analysis to learn how clothing moves with the body.

Size Chart & Fit Details

Function through Technology

We actively seek and develop the most advanced fabrics and manufacturing techniques. From fiber blends to precision cutting, every last detail in our production process plays a critical role in optimizing our garments’ capabilities – and we build, test, and improve continuously.



  • • Core Undershirt
  • • 4-way stretch fabric
  • • 100% coffee-infused polyester
  • • Breathable knit construction
  • • Coffee-infused fibers for odor control
  • • Silky-soft handfeel
  • • Made at MagicTex near Ho Chi Minh City, Vietnam
  • • 4 oz (size Medium)


Simple Wear and Care

We believe that clothing care should require the simplest, least resource-intensive process possible. For this reason, our products never require chemical dry cleaning, pressing, or ironing. From the time you put them on to when you take them off, they should look and feel 100% effortless.

Care Instructions


  • • Machine wash cold
  • • Tumble dry low
  • • Wear to remove wrinkles
  • • DO NOT dry clean
  • • DO NOT hot iron
  • • DO NOT press


Core Crew Neck


Size (Size Chart):
  • XS
  • S
  • M
  • L
  • XL
  • XXL
This T-shirt is also available as a V-neck.

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