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Numi is an online retailer specialising in sweat-proof undershirts designed exclusively for women. The brand was founded in 2013 and has since sold over 400,000 undershirts worldwide.

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At a glance

About NUMI

Founded
2013
Main category
Women's sweat-proof undershirts
Price range
From £53.63 GBP
Return policy
30-day money-back guarantee
Returns
Easy returns and exchanges for US and Canada orders
Target audience
Women, all ages
Ships to
AU, CA, NZ, AE, GB, US
Customer service
Via email and chat
Numi positions itself in the premium segment of women's innerwear, targeting professional women and everyday wearers who want to protect their clothing from sweat stains and reduce dry-cleaning costs. The brand was founded by Michelle, a former finance professional who could not find a functional and discreet undershirt for women and decided to develop one herself. Numi's philosophy centres on three pillars: people, product and planet, with attention to ethical supply chains, employee wellbeing and thoughtful product development. The range includes modal and mesh styles, as well as merino wool options, available in a range of neutral and skin-tone colours across sizes XS to XL and beyond.
July 2026

Active promotions

Ready to use with your order at NUMI.

Buy 2 undershirts and get 1 free, a multi-buy discount that reduces the cost per item when purchasing several styles at once.
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A referral programme that rewards existing customers with a discount when they introduce a friend who makes a purchase.
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Recent

NUMI in the news

Recent updates and background about NUMI, summarised in our own words.

NUMI

The Signature Undershirt

Numi's Signature Undershirt is designed to offer all-day sweat protection for women. It is described as odour-resistant, breathable and suitable for professional wardrobes.

NUMI

The Crop Undershirt

The Crop Undershirt features a cropped silhouette intended to pair with high-waisted bottoms while providing discreet sweat protection. It is part of Numi's core modal collection.

NUMI

The Short-Sleeve Crewneck Undershirt

Numi's Short-Sleeve Crewneck is an ultra-soft base layer with built-in sweat protection, positioned as an everyday essential for wearing under multiple outfit types.

Summaries by Image Review based on publicly available sources and our own editing. External links may contain affiliate links.

Frequently asked questions

What others ask about NUMI

Answers to the most common questions, based on search behaviour and our own research.

Is Numi a reliable webshop?

Numi has been operating since 2013 and reports having sold over 400,000 undershirts worldwide. The brand offers a 30-day money-back guarantee with no questions asked, which suggests a degree of confidence in their product quality.

What is Numi's return policy?

Numi offers a 30-day money-back guarantee on its products. Easy returns and exchanges are available for orders placed in the US and Canada.

Which countries does Numi ship to?

Numi ships to several countries including Australia, Canada, New Zealand, the United Arab Emirates, the United Kingdom and the United States. Prices are shown in the local currency depending on the selected region.

What types of undershirts does Numi offer?

Numi offers a range of women's sweat-proof undershirts in modal, mesh and merino wool fabrics. Styles include the Signature, Crop, Square Neck Cap Sleeve, Short-Sleeve Crewneck, Scoop Neck Lace Overlay and more, available in a variety of neutral colours.

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