How to Choose the Right Sweat Proof Undershirt

August 31, 2020 10 min read

How to Choose the Right Sweat Proof Undershirt

The invention of the sweat proof undershirt has quite literally changed the lives of tens of thousands of men and women worldwide. By simply wearing a specially designed undershirt, many people who suffer from hyperhidrosis, or excessive sweating, experience bolstered assurance, or what we at Ejis like to call “wearable confidence.” They are finally freed from the embarrassment of sweat marks, pit stains, and odor associated with heavy perspiration.

If you suffer from excessive sweating, you know that not all products that claim to be sweat proof are created equal. The manufacturing of sweat proof undergarments is becoming a competitive industry. And as a consumer, it can be overwhelming trying to decide which sweat proof products to select. Many brands claim to have the magic technology to stop perspiration before it reaches your dress shirt. But does their sweat proof undershirt actually work?

The truth is that you really won’t know if a specific product works until you try it. And while choosing any undergarment is a deeply personal matter, you can make an educated purchase given the right tools and information. To help you navigate through the options, we’ve outlined the essentials of a sweat proof undershirt and compared similar products of the industry leaders. This will help you choose the right sweat proof undershirt for you – though we think you'll see why we think our undershirts here at Ejis are a strong contender!

Comparing Sweat-Proof Undershirts

Sweat proof undershirts are made for people who suffer from excessive sweating, or hyperhidrosis. Their sole purpose is to stop sweat from reaching your outer clothes. (Unfortunately, they are not designed to stop your body from sweating… scientists and chemists still struggle with that monumental task!)

Let’s examine what makes up an effective sweat proof undershirt and how the technology works. For the purpose of this review, the comparisons include only each company’s flagship undershirt:

If you experience heavy sweating that leaves marks and/or stains during a regular workday, you understand how valuable such a product can be. Simply put, sweat proof undergarments prevent the embarrassment associated with excessive sweating and can save you an enormous amount of money associated with laundering and replacing clothing stained by underarm sweat.

What Makes a Good Sweat-Proof Undershirt?

How to Choose the Right Sweat Proof Undershirt

An effective sweat proof undershirt helps regulate your body temperature, keeps your outer layer of clothing dry, and prevents odor associated with excessive sweating or ineffective deodorant products. Ideally, it is also invisible under your clothes by fitting close to your body and staying tucked in.

What follows is a list of the 10 most important things you’ll want to consider before purchasing your first sweat proof undershirt, ranging from the actual physical elements of the undershirts to the policies of the company selling them. 

  1. Sweat proof technology
  2. Fabric
  3. Fit
  4. Odor protection
  5. Sizes
  6. Colors and styles
  7. Laundering
  8. Guarantees, exchanges, and returns
  9. Cost
  10. Performance

Carefully ponder each of these components as you explore your sweat proof undershirt options. Let's explore each one in turn.

1. Sweat Proof Technology

The technology used in a sweat proof undershirt to provide sweat protection is pretty similar. A protective layer typically targets the areas where a person most commonly sweats, such as the underarms. The construction of the protective layer typically involves several layers. The combination of these layers accomplishes three goals:

  1. It creates an impenetrable barrier to keep sweat from transferring to your shirt.
  2. It keeps you cool and dry.
  3. It prevents odor from penetrating clothing.

The actual design of the protective layer varies among brands. For instance, the sweat proof layer of Ejis undershirts is all one piece. This seamless design lessens the chance of leakage since seams are usually the weak points in sweat breakouts. Most other sweat proof protection layers are constructed from separate pieces sewn together. They include a seam along the armpit, which coincidentally, is one of the hubs of sweat production.

The padded protection is not for everyone, though many men find that it’s just a matter of getting used to the added layers under their arms. And for most, the added protection is a welcome tradeoff to the inevitable embarrassment of sweating through a shirt. While the pads may initially feel awkward, the bottom line is that no one will know you’re wearing a sweat proof undershirt. (Unless you’re like surgical technician Tom who has no shame in touting – and showing off— his new Ejis micro modal undershirt by lifting his scrubs over his head.)

Ejis, as well as most of the top brands, carry sweat proof undershirts with specific underarm protection. Sweat Shield also offers undershirts with specific back coverage; while Sutran and NanoDri tout all over coverage.

2. Fabric

The fabric used to make sweat proof undershirts is critical to the shirt’s effectiveness and comfort. Ideally, the fabric should be comfortable, breathable, and durable. Modal and micro modal fabrics are becoming the industry’s five-star standard because they are lightweight, extremely soft and retain their shape after washing, unlike cotton.

The fabric used to make sweat proof undershirts is a critical component.

Ejis uses micro modal fabric because it’s so soft and smooth it feels like silk against your skin. And let’s face it, there is no harm in something feeling good against your skin, especially if you wear it for 12 hours a day. DEEPVTEE, Kleinert’s, and Sweatshield also use micro modal fabric. NanoDri is the only brand made from polyester.

To ensure a good fit and fluid range of motion, the fabric should also have some give or stretch. To achieve this, most companies now add a small percentage of Spandex, Lycra, or Elastine.

3. Fit

Over time, the technology of the sweat proof undershirt has evolved and so has its design and fit. The consistency of protection relies heavily on the fit of the undershirt in terms of its cut (shape) and length.

While some brands still sell traditional fit sweat proof undershirts, most now feature a slim-fit design as their signature model. Here at Ejis, we believe a benefit of a slim or contoured fit is its seamless, near-invisible appearance and protection.

Another component to assuring a good fit is the length of the sweat proof undershirt. With the exception of Sutran, all of the industry leaders add extra length to their signature undershirts. Not only is this important to ensure the undershirt stays tucked in, but it is also essential to keeping the shirt’s sweat proof layer in the right place. And when companies like Ejis use a fabric combination like micro modal with added Spandex, the extra length doesn’t cause the fabric to bunch below the waistline.

4. Odor Protection

Sadly, the first hint of body odor can undo all of the confidence a sweat proof undershirt provides. This is especially true if you switch to an all-natural, aluminum-free deodorant or antiperspirant, such as Native, Lume, and ZeroSweat.

Many brands are so focused on making sure their products block sweat that the odor-fighting component is often overlooked or comes as an afterthought. While most of the sweat proof brands claim their undershirts have anti-microbial properties, only Ejis and ItsDri have taken the extra step to add an all-natural element to specifically fight odors.

The fabric used to make Ejis undershirts is infused with silver, which combats odor. As one microbiologist wrote in a review: “the addition of silver fibers makes a big difference too, and it was my professional choice to go with (Ejis products)... no smell as it prevents bacteria to grow.” Conversely, ItsDri infuses its sweat pads with copper, which works in a similar way as the silver.

5. Sizes

Whether you have a sleek runner’s frame or have a former college defensive guard’s physique, finding the right size may be a challenge. Although, as previously mentioned, most sweat proof undershirts made with added Spandex afford some wiggle room in the sizing department.

We’ve found that most companies offer men’s sizes S through 2XL. If you are looking for a smaller size, the following companies offer XS: Ejis, Thompson Tees, and Kleinert’s. Conversely, 3XL is available from Ejis, Thompson Tees, Kleinert’s (for an additional $1), and Sutran. Kleinert’s is the only brand that offers 4XL (for an additional $2).

6. Colors and Styles

Thankfully sweat proof undershirts are not limited to your grandfather’s white crew necks that beam like a beacon when you loosen your tie and unbutton the first button of your dress shirt. Most brands offer a variety of colors and several neckline options.

While a white undershirt is a traditional choice; it is not invisible under white and light-colored shirts. And let’s face it, invisibility is one of the factors in a truly effective sweat proof undershirt. Ejis, Thompson Tees, ItsDri, and NanoDri all offer grey and/or nude colored undershirts, which reduce the visible lines under white and light-colored dress shirts. Ejis, Thompson Tees, Kleinert’s, and NanoDri also sell black sweat proof undershirts that can be worn under dark colored shirts.

Necklines also vary with crew neck, v-neck, and deep v-neck styles. Each one serves a distinct purpose in a man’s wardrobe. The crew neck is well hidden underneath a dress shirt and tie. However, for those men who want to wear a shirt with the top button undone, a v-neck is the preferred neckline. And for the men who want the freedom to wear an unbuttoned shirt or v-neck sweater, the deep v-neck is ideal.

Ejis is the only company that offers all three neckline styles in a slim fitting undershirt. Most all of the other brands carry the traditional crew necklines, with the exception of ItsDri and DEEPVTEE. Thompson Tees, Kleinert’s, Sweatshield, ItsDri, and Sutran offer undershirts with v-necks, while NanoDri and DEEPVTEE sell undershirts with deep v-necks.

7. Laundering

To ensure the effectiveness and longevity of your investment, be sure to follow specific laundering instructions. While most of the sweat proof undershirts are machine washable, many require line or air drying. Ejis, Thompson Tees, and ItsDri all offer products that can be machine washed and machine dried, which definitely makes a busy guy’s life easier. (The micro modal fabric used in Ejis sweat proof undershirts, and others, retains its shape even after repeated machine washing and drying.)

Just like your body, a sweat proof undershirt needs to breathe after each use. After wear, be sure to take it off and pull it inside out to allow the fabric to breathe and get fresh air. As a general rule, don’t dry clean or use bleach or vinegar, as that can damage the sweat proof layer.

8. Guarantees, Exchanges, and Returns

A sweat proof undershirt is an investment, and its success for your specific body type is unknown until you’ve had a chance to try it out. You won’t know if you like how it feels, fits, or performs without wearing it first. That’s why it’s imperative to choose a company with some sort of guarantee or generous exchange policy.

Most of the industry leaders have a guarantee or exchange policy for new customers; though it is advisable to read the fine print before making the purchase. A few questions to consider: Does the company back its product? Can you get your money back if it doesn’t work or fit right? How long do you have to make an exchange or return?

Sweat Proof Undershirts Guarantees and Returns Comparison Chart 

Ejis is the only company that has a First Product Guarantee to either replace or refund 100% of the first undershirt within 45 days of purchase without the hassle of returning it. Additionally, all other returns or exchanges of unopened, unworn undershirts can be made within 45 days of purchase.

Other companies with generous guarantees or return policies include:

  • Sweatshield customers can return their used undershirt for a 150% refund within 30 days of the purchase. (One used, up to five unused.)
  • ItsDri generously allows 60 days for any used or unused first product to be returned for a full refund.
  • Thompson Tees accepts returns or exchanges on all opened or used products up to 30 days of the order.
  • DEEPVTEE offers a 14-day trial that includes free return/refund.

9. Cost (including shipping)

Let’s face it. sweat proof undershirts are not as cheap as a regular cotton undershirt. To be effective, these high-tech undergarments are made from quality components and specialized fabrics. Prices for each brand’s signature sweat proof undershirt range from $29.99 (DEEPVTEE) to $49.99 (Sweatshield).

While the price of the actual undershirt is considerable, additional shipping costs can add up quickly. Thankfully Ejis, along with most of the American companies, offers free domestic standard shipping. (Though Thompson Tees and Kleinert’s require a minimum purchase amount to qualify for free shipping.) ItsDri stands out with free domestic and international shipping.

For a breakdown of costs and free shipping, check out the price comparison chart.

Sweat Proof Undershirts Price Comparison Chart

10. Performance

It’s hard to know how a sweat proof undershirt performs in real-life situations by simply reading the brand’s product description or by viewing an advertisement. Before purchasing a product, we recommend visiting the platforms where sweat proof undershirts are sold to read reviews written by satisfied (and unsatisfied) customers who have had the opportunity to test out sweat proof products.

Visit the company’s online store (if available), Amazon, and other online selling platforms to view customer reviews and ratings. As mentioned before, not everyone perspires in the same way, and the real-life experiences of a customer may resonate with you. It’s also a great opportunity to get a sense of the customer service each company provides. How a company handles a complaint, or a shipping error is just as important as the way in which it handles its success stories.

You’ll find many satisfied customers describe their experience with Ejis sweat proof undershirts as “life-changing,” which is the reason why the company was started in the first place: to help men exude confidence in spite of their excessive sweating.

For example, Dirk exclaims: “Who knew that confidence can come with something as simple as a T-shirt! This product has improved my life more than I could have imagined.”
And Johnpaul explains: “I was very skeptical going into this but I would 100% recommend this product to anyone with a job that has them on the move all day. I put the undershirt and socks to the ultimate test on Saturday wearing them whilst photographing a wedding for 13 hours. Did I sweat? Yes, as much as I ever do but with two very noticeable differences. I didn’t sweat through my shirt and I didn’t smell!”
“I’ve had problems with sweaty armpits for a very long time. All my shirts would eventually end up with yellow pit stains that were so difficult to remove,” Hugo confesses. “I haven’t had that problem since I started using these shirts. They are so comfortable and soft.”
While allegiances are often strong with long-time, satisfied customers, independent professional reviews are also a good source for performance. Such reviews have praised the Ejis undershirt for its performance, effective sweat proof protection, comfort, durability, and odor resistance. According to the Stop-Sweating-Now blog review, “This (Ejis) undershirt does exactly what it was designed for. You will not have any leaks or sweat stains showing up, even after wearing for an extended period.”

Choosing the Right Sweat Proof Undershirt

Sweat Proof Undershirt Comparison Chart

No doubt, there are numerous brands producing effective sweat proof undershirts. Use the comparison table above to help you choose the right sweat proof undershirt that will give you the life-changing “wearable confidence” you’re seeking with the assurance a no-risk guarantee.


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