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How to Find the Right Sweat Proof Thompson Tee for Your Sweating, Fit & Style Needs

For some people, buying undershirts is an afterthought. But if you sweat heavily throughout the day, the undershirt you choose is key to helping you manage your sweat.

But it’s more than just blocking sweat. We know that you have distinct fit and style preferences. To help you purchase the right Thompson Tee for your needs, we created a style guide based off personal experiences and real customer feedback to help guide your purchase.

How Thompson Tee’s Sweat Proof Undershirts Work

We designed our sweat proof undershirts to conceal any trace of underarm sweat. Every undershirt has a patented, clinical-grade sweat proof material called Hydro-Shield that blocks moisture from passing through. 

Other competitors' products use chemically treated material that washes out over time. The Thompson Tee Hydro-Shield technology has native properties, meaning they are part of the fabric and won’t lose their effectiveness over time.

Slim Fit Vs. Original Fit: Which Is Right for You?

Both our menwomen’s sweat proof T-shirts come in two main styles: Original Fit and Slim Fit. Each include our patented Hydro-Shield technology that traps sweat and allows it to evaporate rather than soak through your shirt.

When wearing an undershirt nearly every day, you need a product that will last — and protect your clothing investment. We use premium combed cotton and high-quality rayon from bamboo to create superior sweat proof T-shirts. We chose to use bamboo because it's an ultra-soft, durable material that hugs the body, providing a slimmer fit compared to the cotton version.

What size undershirt should you buy? We created our sweat proof Thompson Tees to follow typical T-shirt sizing. If you wear a size large in most undershirts, you will probably want to order a size large in your Thompson Tee. Our Slim Fit undershirts are intended to fit tighter than the original version.

Here are both our men’s and women’s sizing charts for reference:

Beyond body measurements, there are a few other factors that could affect the size and style that suits you best.

1. Your Sweating Level

All Thompson Tees are guaranteed to block 100% of underarm sweat. But if you're looking for the most sweat protection possible, it's important to know that our sweat proof underarm panels are scaled to size, meaning a size 2XL shirt will have a larger underarm barrier than an XL, for example.

What Women Need to Know

Due to design limitations, our Women’s shirts have smaller underarm barriers than the men’s styles. However, they are also scaled to size, so if you’re in need of more sweat protection, try a size up.

Among extreme sweaters, some women prefer to wear Men’s shirts for the extra sweat protection. We offer XS sizes for both our Regular and Slim Fit Men’s shirts, which could be a great option for women who experience severe axillary hyperhidrosis.

2. Your Fit Preference

For most people, the shirt and size you choose will ultimately depend on your fit and style preferences. 

For example, both our Men’s and Women’s Slim Fit shirts are intended to fit snug, making them more discreet underneath your clothing. The Original Fit provides a little more breathing room for those who prefer a looser undershirt. 

If you're looking for the most sweat protection but like the fit of a typical T-shirt, you may want to try a size up in the Original Fit shirts.

3. Your Style & Color Preference

Choosing the right Thompson Tee also depends on your style. Think about what you wear daily. Do you wear suits or dress shirts often? If so, the Slim Fit option may be a great choice. If your daily wear is much more casual, the Original Fit will do the job. 

The colors you wear also matter. Thompson Tees are available in up to 7 colors for  men and 5 colors for women.

The bottom line? If you're still unsure about which sweat proof Thompson Tee is right for you, t ry one risk-free today (save 20% with code TEES20). We make it easy for you — put it to the test for 30 days (wear it and wash it!) to make sure you've found the perfect solution for your underarm sweating.