Aiko is 5&
Aiko is 5'8" and wearing a size XS
Aiko is 5&
Aiko is 5'8" and wearing a size XS
Ashleigh is 5&
Ashleigh is 5'11" and wearing a size M
Ashleigh is 5&
Ashleigh is 5'11" and wearing a size M
Aiko is 5&
Aiko is 5'8" and wearing a size XS

The Short Sleeve Mock Neck Undershirt

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Your classic mock neck for fall and winter, now with a short sleeve. Wear under a cozy crewneck or cardigan for a perfectly layered look. This Essential Undershirt will keep you warm, and dry, all season long.

Our Essential Undershirt collection was designed to keep you feeling fresh and your clothes clean.

  • Absorbent underarm gusset with Contemporary Cotton Technology
  • Thermo-regulating TENCEL™
  • Invisible fit
  • Reversible neckline with a scoop or crew neck
  • Made in Canada
  • 90% TENCEL™ is soft, breathable and keeps you cool and dry
  • 10% LYCRA® for optimal stretch and comfort
  • Fabric is responsibly knit and dyed in Canada
  • Machine wash cold, tumble dry low
  • Wash with like colors
Being mindful of our impact has always been at the core of what we do. This year we’re taking it further. We are in the process of auditing our impact. Stay tuned, we'll be sharing the results later this year.

Free shipping on U.S. and Canada orders over $150. All full-priced orders are eligible for free returns within 30 days of your delivery date.  

All of our products are made in Canada and ship directly from Toronto, ON.

Items purchased at 30% off and above are final sale. Find out more about our return policy here.

Because you love this

Explore Our Fabric Technology

Sustainable Silk™

Meet the easy wear, easy care Numi silk collection. Wear your silk whenever, however. Stylish pieces made from Numi's Sustainable Silk that look and feel beautiful and are free from the standard silk stresses like staining and dry cleaning.

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Contemporary Cotton™

Liberate your wardrobe.  The Essential Undershirt, a cult product that changes lives and dry cleaning bills.  Wear that favorite shirt without a care.  Sumptuously soft base layers that keep you feeling fresh and clean, today and tomorrow.

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Forward Thinking Materials

Functional fabrics designed to make your life easier and be kinder to the planet.

Contemporary Cotton™ is a high-performance moisture management system that moves moisture away from the body.  It keeps you cooler and drier.  And washes clean of odors. 

Sustainable Silk™ is a blend of Naia™ and silk. It is treated with bluesign® certified stain resistant technology making the garment stain resistant from any water based liquid, while being machine washable.

About Numi

Numi was born out of personal necessity. One day our founder, Michelle, realized she never wore her favorite clothes. They were either prone to noticeable sweat stains or expensive to dry clean. When she looked for a solution, there was nothing available. And so Numi was born.

Numi is a brand that celebrates what it means to be a woman. We make consciously created products that make life a little easier for us all and inspire a culture of kindness.

Committed to Sustainability

Being mindful of our impact has always been at the core of what we do. We like to think of it as a living commitment that grows and evolves with us. This year we're taking it further. We are in the process of auditing ourselves to see how and where we can be kinder to the planet.

LEARN MORE