Bestseller
"#color_almond| Emi is 5'7.5" and wears a size S
Emi is 5'7.5" and wears a size S
"#color_almond| Emi is 5'7.5" and wears a size S
Emi is 5'7.5" and wears a size S
"#color_almond| Emi is 5'7.5" and wears a size S
Emi is 5'7.5" and wears a size S
The Signature Undershirt - Numi
 
The Signature Undershirt - Numi
 
The Signature Undershirt - Numi
 
The Signature Undershirt - Numi
 
"#color_almond| Emi is 5'7.5" and wears a size S
Emi is 5'7.5" and wears a size S
"#color_almond| Emi is 5'7.5" and wears a size S
Emi is 5'7.5" and wears a size S
"#color_toffee| Tolu is 5'7.5" and wears a size M
Tolu is 5'7.5" and wears a size M
"#color_toffee| Tolu is 5'7.5" and wears a size M
Tolu is 5'7.5" and wears a size M
"#color_black| Siobhan is 5'8.5" and wears a size S
Siobhan is 5'8.5" and wears a size S
"#color_black| Siobhan is 5'8.5" and wears a size S
Siobhan is 5'8.5" and wears a size S
"#color_white| Siobhan is 5'8.5" and wears a size S
Siobhan is 5'8.5" and wears a size S
"#color_white| Siobhan is 5'8.5" and wears a size S
Siobhan is 5'8.5" and wears a size S
"#color_HEATHER GREY|Estyr is 5'9", wearing a size XS
Estyr is 5'9", wearing a size XS
"#color_HEATHER GREY|Estyr is 5'9", wearing a size XS
Estyr is 5'9", wearing a size XS
"#color_TRUFFLE | Ashleigh is 5’11” and wears a size L
Ashleigh is 5’11” and wears a size L
"#color_TRUFFLE | Ashleigh is 5’11” and wears a size L
Ashleigh is 5’11” and wears a size L
"#color_BLUSH| Emi is 5'7.5" and wears a size S
Emi is 5'7.5" and wears a size S
"#color_BLUSH| Emi is 5'7.5" and wears a size S
Emi is 5'7.5" and wears a size S
"#color_CLOUD BLUE | Alex is 5'7" and was wears a size small
Alex is 5'7" and was wears a size small
"#color_CLOUD BLUE | Alex is 5'7" and was wears a size small
Alex is 5'7" and was wears a size small
"#color_NAVY | Alex is 5'7" and was wears a size small
Alex is 5'7" and was wears a size small
"#color_NAVY | Alex is 5'7" and was wears a size small
Alex is 5'7" and was wears a size small
"#color_NAVY | Alex is 5'7" and was wears a size small
Alex is 5'7" and was wears a size small

The Signature Undershirt

Sale price$73.00
Buy 3+, Save 15% | Buy 5+, Save 20%
Size:

Size

Color:ALMOND

Classic

Limited Edition

Choose from pre-selected bundles here.

Sweat

STOPS SWEAT STAINS

Sweat

ABSORBS MOISTURE & ODOR

Sweat

LIGHTWEIGHT & BREATHABLE

Sweat

4-WAY STRETCH

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FITS TRUE TO SIZE

Elevate Your Outfit: Say Hello to the Better Base Layer

Meet our #1 best seller, The Signature. This OG undershirt is the ultimate base-layer for every outfit. No more sweat-stains or deodorant marks – stay fresh and feel clean all day with this game-changer. With 250,000+ sold worldwide, The Signature Undershirt is the real deal.

Free Shipping & Easy Returns

Free shipping on U.S. and Canada orders over $150. 

Please allow up to 2-3 business days for processing before your order ships. More shipping info here.

Returns

Items purchased with a 0-19% discount are eligible for refund, within 30-days of the delivery date. Items purchased with a 20% discount or higher are eligible for exchange or store credit.

Gift cards are non-refundable, and items listed as  Last Chance and Final Sale are not eligible to be returned or exchanged, meaning that no returns, exchanges or refunds can be accommodated.

Find out more about our return policy here.  

Free Shipping & Easy Returns

Free shipping on U.S. and Canada orders over $150. 

Please allow up to 2-3 business days for processing before your order ships. More shipping info here.

Returns

Items purchased with a 0-19% discount are eligible for refund, within 30-days of the delivery date. Items purchased with a 20% discount or higher are eligible for exchange or store credit.

Gift cards are non-refundable, and items listed as  Last Chance and Final Sale are not eligible to be returned or exchanged, meaning that no returns, exchanges or refunds can be accommodated.

Find out more about our return policy here.  

30-Day Money Back Guarantee

We stand by the quality of our products. If you're not completely satisfied within 30 days of your purchase, contact us and we'll gladly refund your order. It's that simple.

30-Day Money Back Guarantee

We stand by the quality of our products. If you're not completely satisfied within 30 days of your purchase, contact us and we'll gladly refund your order. It's that simple.

Chat for Size Help

Use our chat icon at the bottom left corner to chat with a live agent or send us an e-mail at customer@wearnumi.com

Chat for Size Help

Use our chat icon at the bottom left corner to chat with a live agent or send us an e-mail at customer@wearnumi.com

Find Your Perfect Styles

Buy 3, Get 15% off.
Discount code automatically applied at checkout.

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The Crop 

Perfect for reducing bulk around your mid-section, especially when wearing high-waisted bottoms.

LEARN MORE 

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The Square Neck

Designed with cap sleeves to seamlessly layer under all your shorter sleeved blouses. Features a flattering square neckline.

LEARN MORE

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The Three Quarter 

Classic fit with sleeves hitting just below the elbow. It features a reversible neckline for added versatility.

LEARN MORE

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The Signature

Our #1 best seller is the ultimate base-layer for every outfit. No more sweat-stains or deodorant marks.

LEARN MORE

As Featured In

Numi
Numi
Numi
Numi
Numi
Numi

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.

Our sweat-proof undershirts were created to be the perfect base-layer for day-to-day dressing. They feature our innovative Contemporary Cotton underarm shield, designed to wick and absorb moisture to prevent sweat stains from showing on your clothes. With the body made from a breathable TENCEL™ fabric, our undershirts also help to regulate your body temperature, ensuring all-day comfort.

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 Essential 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.

Absolutely! All our undershirts are machine-washable and dryer safe. Simply wash them cold and with like colors.

More Ways To Feel Your Best