The Best Sweat Proof Undershirts for Heavy Sweating

The summer heat is creeping in. It’s time to get serious about your sweat management.

Luckily, there are plenty of anti sweat options that don’t involve serious surgery or medical procedures.

Sweat proof undershirts are our favorite way to manage heavy sweating. They’re a chemical-free, non-invasive, natural way to stop sweat stains.

We’ll cover what to look for in a sweat proof undershirt, features, pros and cons and a side-by-side comparison of the top shirts on the market.

The Best Sweat Proof Undershirts

Let’s get started with a break down of our favorite sweat proof undershirts.

  1. Thompson Tee Sweat Proof Shirts
  2. Sweatshield
  3. ItsDri
  4. Ejis
  5. Knix
  6. Numi

1. Thompson Tee Sweat Proof Undershirts

Thompson Tee is one of the first sweat proof shirts. They have the only patent in the market for their Hydro-Shield sweat proof technology.

Where previous sweat proof products are treated or have removable armpit pads, Thompson Tees have sweat proof barriers built directly into the armpits, so the sweat protection doesn’t wash out or lose effectiveness.

Thompson Tee also provides extensive information on their sweat proof technology and how it works. Each shirt has a sweat proof barrier with a proprietary stitching and layering system (called their Hydro-Shield technology). It traps moisture and releases it as vapor, stopping sweat marks from seeping through.

Thompson Tee is also one of the lowest price points, especially for the quality of the fabric and one of the few that offers a free trial period with no strings attached.


  • Men & women’s styles
  • Original fit and slim fit styles
  • V-neck and crewneck necklines
  • Tagless, lay-flat collar for no bunching or annoyance
  • 100% made in the U.S.A.
  • Sweat proof guarantee: it works, or your money back
  • Longer length to stay tucked in
  • High-quality fabric that stands up to consistent washing

2. Sweatshield

Sweatshield undershirts have a sweat proof armpit barrier to absorb moisture and neutralize odor. They currently offer V-neck and crewneck versions of their undershirt for men and women.


  • Micromodal fabric
  • Sweat proof barrier to stop sweat
  • The Sweatshield has an extra-long length, so the shirt stays tucked in.

3. ItsDri

ItsDri is another option in the sweat proof undershirt market. ItsDri stakes its claim on their Aqua-Block technology, a three-layer system to trap sweat. The fabric is also infused with copper to help eliminate odor.

One thing to know about ItsDri — the shirts are designed to be extra long (up to three extra inches) and are slim-fit only. They also currently only offer white and nude.


  • Men & women’s styles
  • V-neck (men) and scoop neck (women)
  • Extra-long, slim-fit style

4. Ejis

Ejis is newer to the sweat proof shirt market than some of the other players. Their armpit barrier includes a large waterproof panel in each underarm to stop sweat from seeping through. The fabric is also infused with silver to prevent odor.


  • Men’s fits and styles only
  • V-neck, crewneck and deep V-neck
  • Extra length

5. Knix Don’t Sweat It T-Shirt

Knix is a garment company that focuses exclusively on women. Their primary products are women's bras and underwear. However, they also offer a “Don’t Sweat It” shirt with sweat proof armpit protection.


  • Women’s style
  • Slight V-neck neckline
  • Sweat blocking underarm panels
  • Form-fitting style
  • Four-way stretch fabric

6. Numi Signature Seamless

Numi is another women’s option. They make technical undershirts for women.

The final option we tested is Numi’s Signature Seamless undershirt. At $59, it’s the most expensive women’s sweat proof shirt currently on the market.


  • Women’s styles only
  • Short sleeve, crop top, mock turtleneck three-quarter and lace-capped sleeved styles
  • Scoop neck and crewneck
  • Form-fitting
  • Reversible neckline

What to Look For in a Sweat Proof Shirt

Before comparing these top brands, ask yourself: Which qualities are most important in a sweat proof shirt?

  • Sweat proof technology: You want it to work. No sweat marks or pit stains, period.
  • Price: You want high-quality, but you don’t want to pay an arm and a leg.
  • Design, fit and length: Undershirts and t-shirts are wardrobe staples. They should be high-quality, fit well and hold up to daily use.

If you’re wearing it as an undershirt, you’ll want to make sure it’s comfortable under your clothes and it stays hidden with different tops and necklines. It also needs to be long enough to stay tucked in when needed.

  • Style options: It needs to be cute, duh. But you also want a shirt that works with your wardrobe.
  • Return policy: You want to test it out and make sure the technology works and it fits your wardrobe and lifestyle.
  • Company values: Brands matter. You want to know where your hard-earned money is going.

Side-by-Side Comparison of the Best Sweat Proof Undershirts

Here’s a side-by-side comparison of all the options we covered above. 

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Criteria Thompson Tee Knix Numi Sweatshield Ejis ItsDri
Premium, breathable, light-weight fabric

Premium rayon from bamboo & Spandex

Nylon & Spandex Tencel & Lycra MicroModal MicroModal & Silver Lenzing Modal & Spandex


$48.00 $59.00 $49.99 $36.99 $35.00
Money back guarantee

Wash it, wear it and try it for 30 days

No trial period No trial period Trial period for one shirt Trial period for one shirt Wear it and wash it for 60 days
Try-wash-wear return policy

30-day trial & money back guarantee

30 days — Unworn, must have tags

(Sale items final purchase)

90 days — Unworn, must have tags

(Sale items final purchase)

30 days — Time-consuming return process

45 days — 100% refund policy for 1 undershirt in first order

60 days — 100% refund policy for 1 undershirt in first order

Extra length for tucking - Hems roll up Yes Yes Yes
Handcrafted in the USA

100% U.S. made

Made in China & South Korea Made in Canada N/A Made in China Made in China

Extremely large, obvious underarm panels Sleeves tend to roll up.

Variety of styles

Scoop neck and v-neck, slim fit and original fit options in beige, black, white

Only one style Various sleeve options V-neck and crewneck Crewneck, v-neck and deep v-neck V-neck (men) and scoop neck (women)
Sweat-blocking technology

HydroShield Patented, sweat proof technology designed specifically for excessive underarm sweating. The first sweat proof undershirt on the market.

Fresh Fix Technology®

(website vague/unclear on how the technology works)

Sweat-Secret™ Fabric Technology

Wicks and absorbs moisture.

Underarm sweat shield absorbs and seals moisture.

Waterproof layer infused with silver and MicroModal pads

Aqua-Block 3 layer, seamless construction technology

Environmentally friendly

While all three shirts combat excessive underarm sweat, Thompson Tee is the only one with patented, proven technology guaranteed to stop pit stains and sweat marks.When you’re looking for a great sweat proof undershirt, the top priority is finding one that truly works.

Plus, when you add in price, the fact that they’re 100% USA-made and their satisfaction guarantee, the clear choice is Thompson Tee.

Try a Thompson Tee risk-free today!

Lawrence Hunt

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Try a Thompson Tee For Yourself RISK FREE FOR 30 DAYS

We gladly accept returns or exchanges on all opened or used Thompson Tee shirts up to 30 days from purchase date so feel free to wear it, wash it and try it


Men's Sweat Proof Shirts


Crewneck / V-Neck / Deep V-Neck

Crewneck / V-Neck

Women's Sweat Proof Shirts


Scoop Neck

Scoop Neck / V-Neck