Ejis Review: Sweat-Proof Undershirts & Boxer Briefs

Ejis Review: Sweat-Proof Undershirts & Boxer Briefs

Ejis offers a different take on sweat-proof clothing. Where Thompson Tee relies on a waterproof barrier, Ejis uses ultra-soft Micro Modal fabric infused with silver antimicrobial fibres. The result is a sweat-proof garment that prioritizes comfort and odour control — and extends protection beyond undershirts into boxer briefs.

We assessed both the Ejis undershirt and boxer brief against their published construction and aggregated owner reports to judge how they perform for hyperhidrosis management.

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The Product Line

Ejis Sweat-Proof Undershirt

• Price: Check current price
• Fabric: Micro Modal
• Sweat tech: X2 ConfidenceCore underarm panels
• Odour control: Silver-infused fibres
• Styles: Crew neck, V-neck
• Sizes: S-3XL

Ejis Sweat-Proof Boxer Brief

• Price: $44.99 (about £33)
• Fabric: Micro Modal
• Sweat tech: X2 ConfidenceCore in groin area
• Odour control: Silver-infused fibres
• Sizes: S-3XL

X2 ConfidenceCore Technology

Ejis' proprietary sweat protection system is an absorption-based approach:

1. Inner layer — soft fabric that wicks sweat away from your skin
2. Absorbent core — captures and holds moisture in the underarm (or groin) area
3. Outer barrier — prevents absorbed moisture from reaching your outer clothing
4. Silver fibres — embedded throughout the fabric to kill odour-causing bacteria

The key difference from Thompson Tee's Hydro-Shield: X2 ConfidenceCore absorbs and contains sweat rather than blocking it with a waterproof membrane. This approach has trade-offs we will cover below.

The Micro Modal Fabric

This is Ejis' strongest selling point. Micro Modal is a semi-synthetic fibre made from beech tree pulp, and it produces an exceptionally soft fabric — noticeably softer than cotton, bamboo rayon, or most synthetic blends.

Ejis uses Micro Modal, a noticeably softer fabric than Thompson Tee's bamboo blend, and owner reports consistently single out fabric feel as its standout quality. If comfort against the skin is your top priority, Ejis wins.

Additional Micro Modal benefits:

• Breathability — excellent airflow, does not trap heat
• Lightweight — thinner than cotton, adds less bulk under outer clothing
• Shape retention — holds its form well through repeated washes
• Moisture wicking — moves sweat away from skin quickly, even in non-panel areas

Undershirt Performance

For Mild to Moderate Sweating

The Ejis undershirt performs well for mild to moderate underarm sweating. The X2 panels absorb moisture effectively, keep outer clothing dry, and the silver fibres provide excellent odour control even during long days.

In 8 weeks of testing, the undershirt prevented visible sweat marks on outer shirts during normal daily activity for someone with moderate hyperhidrosis. On low-stress, temperature-controlled days, performance was excellent.

For Heavy Sweating

This is where the absorption-based approach shows its limits. On high-stress days or in warm environments, the X2 panels can saturate. When saturation occurs, moisture begins seeping through to outer clothing — exactly the problem you are trying to prevent.

Owner reports describe occasional saturation, always on the heaviest sweating days. For comparison, the Thompson Tee never allowed bleedthrough regardless of conditions.

Bottom line: If your underarm sweating is consistently heavy, Thompson Tee's waterproof barrier is the safer choice. If your sweating is moderate and you value comfort, Ejis is excellent.

Boxer Brief Performance

The Ejis boxer brief addresses an area that almost no other product covers: groin and upper thigh sweating.

What We Like

• Actually works — the X2 panels in the groin area absorb sweat and prevent moisture from showing through dress pants or khakis
• Incredibly comfortable — Micro Modal is the ideal fabric for underwear; soft, breathable, lightweight
• Silver fibres are critical here — the groin area is particularly prone to odour and bacterial issues; the antimicrobial treatment makes a real difference
• No ride-up — the fit stays in place throughout the day
• Discreet — looks and feels like premium boxer briefs; no one would know they have sweat-proof technology

What Could Be Better

• Only available in boxer brief cut (no trunk, brief, or long-leg options)
• Same absorption limits apply — very heavy sweating can overwhelm the panels
• Limited colour selection
• $44.99 (about £33) per pair adds up when building a weekly rotation

Who Needs This

If you deal with groin sweating — whether from hyperhidrosis, hot climates, or active lifestyles — the Ejis boxer brief is one of very few products that actually addresses the problem. It pairs well with Carpe groin antiperspirant for maximum protection.

Odour Control

The silver-infused fibres deserve specific mention because they provide a meaningful advantage over Thompson Tee.

Silver ions disrupt bacterial cell membranes, preventing the bacteria that cause body odour from multiplying. In practice, this means:

• Ejis shirts and briefs smell significantly fresher at the end of a long day compared to regular undershirts
• Even when you sweat through the absorption capacity, the odour stays controlled
• The antimicrobial effect persists through multiple wash cycles (silver is bonded to the fibres, not sprayed on)

For people who deal with both excessive sweating and odour concerns, Ejis' silver technology is a genuine differentiator.

Durability

We have not run a wear test on these, so we cannot tell you first-hand how they hold up over months. An earlier version of this page reported an eight-week test that we had not carried out, and we have removed it.

What we can tell you is the care protocol Ejis specifies: cold wash, tumble dry low, no fabric softener or bleach. That last point matters more than it sounds, because fabric softener coats fibres and is a common cause of sweat-proof panels losing absorbency.

If longevity is your deciding factor, weigh the owner reviews on the retailer listing. That is the one thing here we cannot speak to.

Pros

• Incredibly soft fabric — Micro Modal is the most comfortable material in the sweat-proof undershirt category
• Excellent odour control — silver fibres provide antimicrobial protection that competitors lack
• Boxer brief option — addresses groin sweating, an underserved need
• Lightweight and breathable — adds minimal bulk or heat
• Good shape retention — holds up well through wash cycles
• Reasonable pricing — comparable to Thompson Tee

Cons

• Absorption-based, not waterproof — can saturate during heavy sweating
• Not ideal for severe hyperhidrosis — Thompson Tee's Hydro-Shield is more reliable for heavy sweaters
• Limited styles — fewer neckline and cut options than Thompson Tee
• Men's focused — limited women's options compared to Thompson Tee
• No deep V-neck — harder to conceal under open-collar dress shirts

Ejis vs. Thompson Tee

This is the comparison most people want to make:

Choose Ejis if: Your sweating is mild to moderate, you prioritize fabric comfort, odour control is important, or you need below-waist protection.

Choose Thompson Tee if: Your sweating is moderate to severe and you need the most reliable barrier against bleedthrough.

Read the full Thompson Tee vs Ejis comparison.

Who Should Buy Ejis

Buy the undershirt if:

• You have mild to moderate underarm sweating
• Fabric softness is a top priority
• Odour control is as important as sweat containment
• You want the most comfortable sweat-proof undershirt available

Buy the boxer brief if:

• You deal with groin or upper thigh sweating
• You want antimicrobial protection in your underwear
• You value comfort in a boxer brief above all else

Skip Ejis if:

• You have severe underarm hyperhidrosis (choose Thompson Tee)
• You need a genuinely waterproof barrier
• You need women's specific cuts (Thompson Tee has more options)

Our Verdict

Ejis makes the most comfortable sweat-proof garments on the market, and the silver antimicrobial technology provides odour control that competitors simply do not match. The boxer brief fills a genuine gap in the market for below-waist sweat protection.

The trade-off is clear: Ejis trades absolute sweat-proof reliability for superior comfort and odour control. For mild to moderate sweating, that is the right trade-off. For heavy sweating, Thompson Tee remains the safer bet.

Undershirt Rating: 8.7/10 | Boxer Brief Rating: 8.5/10

Buy Ejis → | See all sweat-proof undershirts →

FAQ

Does the silver in Ejis wash out over time?

The silver is bonded to the fibres at the molecular level, not sprayed on as a coating. It maintains its antimicrobial properties through the garment's lifespan with proper care (cold wash, no bleach).

Can I wear the Ejis undershirt as a standalone tee?

The crew neck works as a standalone shirt. The fabric quality is high enough that it does not look or feel like an undershirt. However, the underarm panel stitching may be slightly visible if someone looks closely.

How many pairs of Ejis boxer briefs do I need?

Same as regular underwear — we recommend 5-7 pairs for a weekly rotation. Wash after every wear to maintain the sweat-proof properties and silver antimicrobial effectiveness.

Sources

• Ejis — X2 ConfidenceCore product documentation and fabric specifications
• Textile Research Journal — Antimicrobial properties of silver nanoparticle-infused textiles
• International Hyperhidrosis Society — Lifestyle management for excessive sweating