Thompson Tee and Ejis are worth comparing if your main problem is underarm sweat showing through clothes. Both describe a built-in barrier. The useful choice is between their specific fabrics, fit and buying terms, rather than an unsupported claim that one can contain unlimited sweat.
This is desk research, checked on 10 September 2026. We have not worn, washed or measured these shirts. We compare the manufacturers' published specifications and policies; performance promises are their claims. We do not have a controlled comparison or a reproducible scoring method, so we do not give numerical ratings or name an overall winner.
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Compare the exact undershirts
| Choice | Published body fabric | Fit and neckline | What to check |
|---|---|---|---|
| Thompson Tee Original Fit crew neck | Combed cotton; the manufacturer lists a cotton/polyester blend for Heather Grey | Roomier Original Fit, crew neck | Whether the neckline shows under your usual shirt |
| Thompson Tee Slim Fit V-neck | 95% rayon from bamboo, 5% spandex | Closer fit, V-neck | Your chest measurement against this fit's size chart |
| Ejis Micro Modal V-neck | 95% TENCEL Modal x Micro, 5% spandex, excluding barrier and trim | Slim fit, V-neck | Panel position, size chart and first-product return eligibility |
These are separate variants. The main Thompson Tee retailer link below opens the Original Fit crew neck, not the bamboo Slim Fit. Prices, colours and sizes can differ between them. Manufacturer specifications do not establish which fabric will feel coolest or softest to you.
Thompson Tee: a choice of cotton or bamboo-rayon fit
Thompson Tee's Hydro-Shield panels are located at the underarms. The Original Fit crew neck listing describes a cotton body and a longer cut for tucking in. The Slim Fit V-neck listing describes a stretch bamboo-rayon body.
Choose the fit and neckline before choosing a size. A V-neck can suit an open collar, but visibility also depends on the outer shirt's thickness and cut. Neither variant offers full back or chest protection. Thompson Tee also sells anti-odour garments; check that the item you choose actually includes Hydro-Shield underarm barriers.
Read the Thompson Tee review for its sizing and return details. View Original Fit crew neck at Thompson Tee.
Check the formula, pack size, seller and delivery country. Search results may include alternatives.
Ejis: Micro Modal with a waterproof layer
The Ejis Micro Modal V-neck listing describes a stretch modal body and silver treatment for odour control. Its product FAQ explicitly describes a waterproof layer in the underarm panels. An earlier version of this guide incorrectly called Ejis absorbent-only.
Silver treatment is a manufacturer feature, not evidence that the shirt treats a skin condition or that it will outperform Thompson Tee for every wearer. We have no comparative wear-test evidence for either claim. Check the Ejis size chart rather than assuming its slim fit matches Thompson Tee sizing.
Check the formula, pack size, seller and delivery country. Search results may include alternatives.
Choosing for work, heat and everyday use
Start with the area where sweat reaches your clothes. These undershirts target underarms. If your whole back or chest becomes wet, a small underarm panel will not cover that area.
For work shirts, compare the neckline, sleeve length and tuckable length with something you already wear. Check for visible seams under your actual outer layer before committing to several shirts. An additional garment can feel warm; we cannot rank these fabrics for heat comfort without wearing them under comparable conditions.
Check the manufacturer size chart and the return conditions before buying a multi-pack. Trying one eligible item first gives you a chance to assess fit, warmth and panel placement. You do not need to commit to a five-shirt rotation before knowing whether it suits you.
A moisture-wicking sports top and a barrier undershirt serve different purposes. A wicking fabric moves moisture through fabric; a targeted barrier aims to keep it from reaching the outer garment. Neither approach stops sweat production.
UK and US buying choices
US buyers: both manufacturers offer US delivery. Compare the exact variant and final checkout total with the Amazon US option. A manufacturer's direct-store guarantee may not apply to a marketplace seller.
UK buyers: Thompson Tee lists the UK among its shipping destinations. Ejis publishes international delivery options, with availability and charges confirmed at checkout. Compare shipping, taxes and the cost of returning an unsuitable shirt before ordering from a US store.
We have not verified a specific Amazon listing for these variants. The button is a Search Amazon UK link with the UK Associates tag. It is a discovery link, not confirmation of stock, seller or delivery. Our Thompson Tee review explains the direct-store return differences.
Washing and drying
Follow the label for the garment you receive. Thompson Tee's care instructions allow cold or warm machine washing and medium or lower drying heat. Ejis's care guidance specifies cold or warm washing and low drying heat. Both advise turning garments inside out and avoiding bleach, ironing and dry cleaning.
We have no measured wash-life data. A fixed six-month lifespan or a claim that a barrier survives hundreds of washes would overstate this review's evidence.
Related product: sweat-proof boxer briefs
Ejis boxer briefs address a different clothing problem. They belong in below-the-waist coverage, not an undershirt ranking. The manufacturer describes protected areas at the seat and inner thighs; that does not establish complete coverage of every area affected by sweating.
View Ejis boxer briefs if that is the garment you need. Check the precise fabric, coverage and hygiene-return conditions before ordering.
When clothing is not enough
The NHS lists clothing changes and sweat shields among practical measures for excessive sweating. A pharmacist can advise on stronger antiperspirants; see a GP if sweating affects daily life or self-care is not helping. Our antiperspirant guide and underarm sweating guide explain the options. This page is educational and does not replace medical advice.
