







The Merino Wool Signature Undershirt
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Regulates Body Temperature

Itch Free

Odor Resistant

100% Merino Wool

Stops Sweat Stains
We know you love our OG Undershirt, so we've created the winter edition of our Signature Undershirt. Made with 100% Australian Merino Wool and our Contemporary Cotton sweat-proof underarm shields, we guarantee you'll stay warm, dry and cozy all winter.
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Why Wear a Merino Wool Undershirt?

Natural Temperature Regulation
Merino Wool undershirt naturally balances and regulates your body’s temperature, ensuring you stay comfortably cool when it's hot and warm when it's cold.

Stops Sweat Stains & Odors
Say goodbye to embarrassing sweat stains on your clothes with our sweat-proof underarm shields that keep you dry. Odor-resistant properties of Merino Wool will also make you feel fresh and free from unwanted odors.

All-Day Comfort & Itch Free
Enjoy comfort and itch-free wear with our naturally moisture-wicking Merino Wool fabric.

What sets us apart
Sweat-Proof Thermo-Regulating Base Layer
Crafted from naturally thermo-regulating & odor-resistant Merino Wool fabric, our Merino Wool undershirts offer superior breathability and guaranteed itch-free wear, ensuring the ultimate comfort throughout your day.
Its natural anti-bacterial and moisture wicking properties keep you feeling fresh & confident on any occasion.
FAQs
Women need sweat-proof undershirts to prevent visible sweat stains on their clothing and to stay dry and confident throughout the day. It can also help prolong the life of outerwear by reducing the need for frequent washing.
Unlike other merino wool tops, our Numi Merino Wool collection is 100% Australian Merino wool with built-in Contemporary Cotton™ underarm shields for effective moisture-wicking and sweat protection. Our Merino Wool fabric is lightweight and breatable to keep you cool and dry, all day.
Our Merino Wool Undershirts are machine washable: simply wash them on the Wool Setting. If your machine doesn’t have that setting, use Cold Water Wash or Delicate Wash Cycle. Spin, do not tumble dry. We recommend flat drying garments after washing.
We recommend using the size guide (featured on every product page) to determine the best size for you.
Each size guide features a sizing chart and instructions on how-to-measure the item. Generally, we recommend ordering our Merino Wool Undershirt collection in your regular size for the perfect, snug fit. If you prefer a more relaxed fit, we recommend sizing up. If you’re still unsure about sizing, send us an email at customercare@wearnumi.com.