Tested & Approved: This EJIS Sweat Proof Undershirt Blocks Heavy Underarm Sweat

Finally say goodbye to those embarrassing pit stains for good.

Where on our bodies and how much we sweat can be great source of consternation and discomfort for many.

It’s a completely natural bodily function yet when it occurs in excess amounts in undesirable locations the outcome is unpleasant and embarrassing.  

Those who experience heavy underarm sweating on a regular basis in the form of hyperhidrosis often go through many products (undershirts, anti-perspirants, etc.) trying and failing to find a solution that works.

And that uncertainty of whether the product is going to hold-up can even compound the problem (i.e. nervousness leading to more sweating).

Anyone with hyperhidrosis knows all too well that the ideal solution here is finding a non-burdensome solution that works consistently.

Even if you’re someone that isn’t typically a heavy sweater but are looking for extra protection during a particularly stressful event, having that confidence is key.  

After trying and ditching many products over the years, we’ve finally found that sweat-blocking confidence in the EJIS Sweat Proof Undershirt.

Not only does it completely block heavy underarm sweat from reaching your top layer, but it feels amazing and layers great under practically any shirt, dress shirt, t-shirt, polo, sweater, etc.

Here, we’ll lay out what makes for the great fit and feel of the EJIS Sweat Proof Undershirt, demonstrate its sweat-blocking effectiveness, and show you its smooth layering prowess.

Note: Featured products are independently selected and reviewed by The Underwear Review. If you purchase through our links, we may earn commission.

Fit & Features: The EJIS Sweat Proof Undershirt

The way this undershirt fits on your body and feels against your skin is something that really stood out to us.

Because it’s easy to imagine how a company could create an undershirt that effectively blocks underarm sweat and then call it a day, treating everything else as secondary.

But that’s not the case here.

EJIS really went out of its way to get all the other crucial undershirt details correct, as well.

The EJIS Sweat Proof Undershirt has a high-quality undershirt fit and feel with strong underarm sweat protection.

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One of the best features of this undershirt is its lightweight and breathable micro modal fabric that wears great in hot temperatures and for extended periods.  

This undershirt has an extra soft feel against your skin, along with a tagless design, a tapered fit, and off-the-shoulder flatlock stitching to reduce friction across the shoulders for a smooth base layer experience.

Note: While our favorite is this micro modal version, there’s also a cotton version available if you’re looking for a traditional feel.

This undershirt is available in both crew neck and V-neck designs and is treated with SILVADUR, which are odor fighting silver ions that effectively control bacteria.

Spandex stretch added to the fabric and off-the-shoulder flatlock stitching for comfort.

Additionally, this undershirt has a touch of spandex stretch (5%) added to the fabric blend.

Not only does this allow you to move comfortably without restriction but the stretch also helps the fit of the undershirt stay in place, which keeps the underarm protection in place for maximum efficiency.

Another super convenient feature is that this undershirt is machine washable and dryer safe, so you can treat it just like you would any undershirt (i.e. no special treatment or extra work required).  

Testing Underarm Sweat Protection: EJIS Sweat Proof Undershirt vs. Average Undershirt

Now, let’s move into the main feature of this undershirt: underarm sweat protection.

The EJIS Sweat Proof Undershirt provides 140+ square inches of underarm sweat protection, which is key.

Because as all heavy underarm sweaters know, not only can the accumulation of sweat spread a long way across fabric, but your underarm sweat drop zone can expand as you naturally move your body and arms.

To demonstrate just how effective this undershirt is at blocking sweat, we came up with a sweat test that we feel accurately mimics underarm sweat conditions.

Comparing how an average undershirt and an EJIS undershirt handle underarm moisture.

It’s common to see sweat tests carried out with a spray bottle, however, we felt the spray effect doesn’t accurately depict what occurs with underarm sweating. 

So, we used a dropper to mimic the heavy sweat drops that tend to occur underarm.

We applied 10+ drops of water to the underarm of an average cotton undershirt and 10+ drops to the underarm of the EJIS Sweat Proof Undershirt to compare the difference.

Moisture bleeds through the average undershirt but is blocked by the EJIS undershirt.

You can see how the drops quickly soak through the underarm on the average undershirt.

A result that heavy sweaters know would then seep through and dampen your top layer, as well.

On the other hand, the EJIS Sweat Proof Undershirt quickly absorbs the moisture and blocks it from reaching the outer fabric of the underarm.

Not even a hint of moisture is present or showing on the outside!

We’ve also included a video of the sweat test, so you can see the effective sweat blocking coverage for yourself.

It’s also worth mentioning that the EJIS Sweat Proof Undershirt holds up great far past 10+ drops of water (sweat).

Even the heaviest of sweaters will enjoy complete sweat proof coverage and confidence.

Does the EJIS Sweat Proof Undershirt Layer Well?

Let’s not forget that other key undershirt aspect, because it’s right there in the name.

Regardless of sweat-blocking ability, you need an undershirt that fits and wears comfortably under top layers.

We’ve already touched on how the soft and breathable fabric provides a comfortable feel and how its tapered fit with added stretch helps to eliminate bulk and distraction.

But you’ll likely find it helpful to see how the EJIS Sweat Proof Undershirt looks under some common top layer choices.

Layering the EJIS Sweat Proof Undershirt beneath white and blue dress shirts.

Here, you can see how it layers under a dress shirt with classic white and blue color options.

With the semi-transparent white dress, it appears as simply a well-fitting classic undershirt.

And its tapered fit eliminates bulk for a smooth fit as you can see with slimmer cut of the blue dress shirt.

Layering the EJIS Sweat Proof Undershirt beneath a polo and t-shirt.

This undershirt can be worn under short sleeve shirts, as well.

In the picture above, you can see how it fits very nicely under a short sleeve polo shirt and can even be worn comfortably under a t-shirt.

Use Sweat Protection Undershirts to Improve Garment Longevity

Another great way to utilize the EJIS Sweat Proof Undershirt is to think of it as a protective layer rather than just as a sweat-blocking layer.

What do we mean by that?

Say, for example, that you have a particular shirt or sweater that you want to keep in pristine condition, whether it’s an expensive item or just a longtime personal favorite.

One of the biggest threats to the fabric condition and longevity of a clothing item is sweat and all the harmful bacteria and anti-perspirant ingredients that comes along with it.

You might already be aware of the yellow and white stains that can appear on your garments over time in the wake of sweating.

Wearing the EJIS Sweat Proof Undershirt beneath that favorite shirt will help you block sweat from reaching it and help it stay in a better condition for longer, as a result.

When it comes to blocking underarm sweat, the EJIS Sweat Proof Undershirt is our recommended top pick.

However, if you’d like to browse a few other options, check out our list of the Best Undershirts for Stopping Pit Stains.