Your Cart is Empty
Does leaning back against your seat give you anxiety?
Feeling beads of sweat roll down between your shoulder blades to the small of your back can lead to embarrassing pools of sweat on your shirt and the top of your pants.
You shouldn’t have to bring extra shirts with you to work. You shouldn't have to slather your back with chemical antiperspirants. You shouldn’t have to drape a towel over your seat to hide pools of sweat.
The back sweat proof undershirt from Ejis brings the same sweat blocking power of our sweat proof undershirts and expands it to cover your entire back.
That’s over 600 square inches of coverage.
No more sticking to seats.
No more changing shirts in the toilet cubicle at work.
No more hiding your back from clients and co-workers.
Just a bone dry shirt, no matter how much you sweat.
LARGE ONE PIECE WATERPROOF LAYER stops sweat from transferring to your shirt. Think of it as your never-fail backup to antiperspirant deodorant, durable enough to be washed over and over and chemical free.
ENTIRE BACK PROTECTED with a waterproof layer that stops sweat from transferring to your shirt. With the sweat proof protection starting at the collar and travelling down the entire back as well as under each arm, the back sweat undershirt has you covered.
STOP SHIRT SWEAT MARKS with Ejis waterproof undershirts that extend the life of your dress shirts by eliminating yellow stains caused by antiperspirants.
SILVER COMBATS ODOR-CAUSING BACTERIA. Silver is permanently bound to the fibers of our sweat proof undershirts, to keep you fresher for longer.
SUPER PREMIUM MICRO MODAL FABRIC is 2x softer and 50% more water-absorbent than cotton. With 5% Spandex to add stretch, it will possibly be the most comfortable men's undershirt you've ever worn.
STAYS TUCKED IN with added length. The slim fit design keeps the protective area snugly up against your armpits, and your back, so sweat doesn’t you don’t want it.
WHAT THIS UNDERSHIRT WON'T DO is make your sweat disappear. Unfortunately, we can’t stop sweat from happening. It may feel damp on your back and under your arms but sweat stains won't show on your shirt when you wear this powerful no sweat undershirt.
Why Ejis?
We founded Ejis based on the belief we could make you feel more confident by solving two of your most embarrassing problems, sweat marks, and odor. We've woven intelligent design, world class functionality, and unrivaled comfort into our undershirts to give you what we call "Wearable Confidence."
The Ejis sweat proof undershirts were engineered from the ground up specifically for the exceptional man who wants an unfailing, discreet solution to sweat marks and bad odor. Join the thousands of men who are now able to wear what they want because of their Ejis undershirts.
Visit the COVID-19 Update webpage for up-to-date details about international shipping.
U.S. Shipping
Standard Shipping FREE (arrives in 3-10 business days from day of shipment)
Expedited $9.99 (arrives in 2-3 business days from day of shipment)
Priority $29.00 (arrives in 1-2 business days from day of shipment)
Orders are processed at our Utah, USA based warehouse within 24 hours of being placed.
Priority and expedited shipping are not available for P.O. Box addresses. Buyers with orders shipped to Alaska and Hawaii are charged domestic shipping rates.
International Shipping
International shipping may be delayed due to the pandemic. Visit the COVID-19 Update webpage for up-to-date details.
International shipping costs are based on live-rates.
Ejis has partnered with Passport Shipping to handle all international shipments. Thanks to Passport you can now pay taxes and customs/duty fees at checkout so your order won't get stuck in customs and you won't have any surprise fees upon delivery.
Once your parcel has left the United States, please expect it to take roughly 10-14 business days to arrive in your country. This timeline should be reflected in the estimated delivery date on your tracking page. Visit our FAQs for more information about International Shipping.
First Product Guarantee
Buy one undershirt and one pair of boxers and try them out risk-free! If you don’t love them, we’ll send you a different size or issue a refund. No return required. Visit the FAQs for details.
Satisfaction Guarantee 45-day Return Policy
If it’s not covered by our First Product Guarantee, we’ll still issue a refund or process an exchange for orders returned to us within 45 days of purchase. We don’t resell items that have been tried on (because no one wants to buy used underwear) so all returned items must be unopened, unworn, unwashed, containing the tags and are folded neatly inside the original, packaging that is not torn, ripped or cut open. Visit the FAQs for details.
Our sweat proof undershirts and boxer briefs are engineered to prevent sweat stains. Can we stop you from sweating? Heck no! But we can keep sweat marks from appearing on the armpit of your dress shirts and the seat of your pants.
You get a full 45 days from purchase to put your first undershirt to the test to make sure it really works for you just like it does for tens of thousands of other men. If you feel it’s not right for you just let us know and we’ll give you a refund. Valid for single units only. Multi-packs are eligible for our Satisfaction Guarantee 45-day Return Policy. See the FAQ more details.
Bacteria cause odor, and silver has anti-odor properties. We infuse silver particles into our fabrics to help fight that odor-causing bacteria. Our odor-resistant undershirts are scientifically engineered to keep your shirts smelling fresh. Each of our anti-odor undershirts includes this powerful technology, as do our odor-fighting socks and sweat-proof underwear.
It might look like just an undershirt, but there’s a lot of technology behind our design. We begin with a soft, moisture-wicking micro modal pad fused with silver to fight odor-causing bacteria. We then add a durable waterproof layer to help defend your dress shirt from sweat, and finish with a super comfortable outer layer. The result is an undershirt with a sweat-proof barrier that keeps sweat from showing through to your dress shirt, and stops sweat marks or deodorant marks.
Amazing product - perfect fit and feel of fabric. 100% sweat proof. Love it would recommend strongly!! Only complaint is the easy pilling of the fabric after being on a gentle dry cycle - which it needs to go on because it will not dry otherwise.
AustraliaFor the first time, I can go to work wearing light colours and know there won’t be sweat in my back that will be visible. My whole back sweats, and it used to stop me from excelling at work. Now I have confidence, it’s changed my life and it’s the best thing I have ever bought. It would be great if this cover the chest as well, all round protection, but it’s not that big deal, as my back and arm pits. Thank you Ejis, you have really helped me get on with life, I can’t thank you enough
United KingdomHi Kamruz, Thank you for sharing your experience. I am so happy to hear that your Ejis undershirt has been life-changing! We appreciate the suggestions for new products, I will send them on to our product development team. Have a great day, Merrielle Ejis Customer Support
Great at keeping sweat from my outer shirt. They do get very clingy to my back when I try to take them off after work and sometimes golfing. Do wish the back went all the way across and not taper at the shoulder
United StatesHi Jacob, Thank you for leaving a review. I am so happy to hear that your Ejis undershirt is keeping you free from sweat stains. We appreciate your feedback on the fit. I will send it on to our product development team. Best, Merrielle Ejis Customer Supprot
Would be better if the padding went further down the back but other than that, a happy purchase.
United KingdomHi Patrick, Thank you for leaving your feedback. I am glad to hear that you are happy with your Ejis undershirt. Have a great day, Merrielle Ejis Customer Support
Had my shirts for years now and they have given me the confidence to get through the day without the stains.
AustraliaHi Omid, Thank you for leaving a review. I am so happy to hear that your Ejis undershirts have given you wearable confidence to get through your day! Have a great day, Merrielle Ejis Customer Support
The first shirt I ordered was too small. Ejis sent me the new size quickly - no hassle at all. It’s a much better fit and quite comfortable.
United StatesI’m a bit disappointed from the start. The shirt seems nice but I need to return it for a size larger. I always wear a standard large. Their large is skin tight. I hope the XL works.
United StatesHi Patrick, Thank you for sharing your feedback. I am sorry to hear that your undershirt didn't fit the first time. I hope that the XL undershirt is a perfect fit! Please reach out to us at support@ejisinc.com if there is anything more we can do! Have a great day, Merrielle Ejis Customer Support
Awesome! I love this product and it with as advertised.
United StatesHi Darren, Thank you for leaving a review. I am so happy to hear that you are loving your Ejis undershirts! Have a great day, Merrielle Ejis Customer Support
Exactly what I have been looking for. No sweat visable on outer garment, the garment is perfect, just what I needed.
United KingdomHi Andy, Thank you for leaving a review! I am so happy to hear that your Ejis undershirt is exactly what you've been looking for! Have a great day, Merrielle Ejis Customer Support
I am really impressed with this product, the undershirt is a great fit, and true to its word, it keeps the sweat on my back in. The sweat does not show up on my shirt. I have had problems with back sweats for a very long time, which has made life a misery especially in work settings. This undershirt is excellent and I will be making more purchases. Thank you Ejis.
United KingdomHi Kamruz, Thank you for sharing your experience. I am so happy to hear that your Ejis undershirt is keeping you confident and free from sweat marks! Have a great day, Merrielle Ejis Customer Support
I have always been a warm guy, always sweating, always running hot and unable to control my body temperature. Dr's can't seem to figure me out so your shirts and boxer briefs are a business person's dream in my situation. Your products allow me to not "ONLY" wear black shorts/ jeans or black shirts to hide my sweat. I can rock salmon, blues, etc and it is amazing. I used to speak in front of large groups of business owners for work in warm environments and I would always be more concerned if I had butt sweat marks on my khakis or jeans than my presentations or speeches. EJIS is my go to going forward. Thank you for making these products. My only suggestion is making the front of the undershirts the same as the armpits and back, bc If I pick up my kid or fold my arms my shirt then does get wet from sweat on my chest. Thanks again
United StatesHi Justin, Thank you for sharing your experience. I am so happy to hear that your Ejis products are your go-to for keeping you dry and confident. We appreciate the suggestion for making the front of the undershirts sweat proof. I will send this on to our product development team. Have a great day, Merrielle Ejis Customer Support
Positively no sweat made it to my shirt, even in hot, humid Midtown on a June afternoon
United StatesHi Mark, Thank you for leaving a review. I am so happy to hear that your Ejis undershirt kept you dry all afternoon! Have a great day, Merrielle Ejis Customer Support
In my experience, I start off my day by seeing a patient and then running to the restroom to wipe down my back that's drenched in sweat and changing undershirts. I usually have to repeat this process multiple times a day. It's embarrassing and really messes with your mental health. I saw these recommended on reddit no less, so I tried a shirt / boxer combination because it's all I could afford. I tried it out twice with light colored scrubs and it was fantastic! no dripping back/stains or leg/butt sweat stains. I'm hoping I can afford another couple pairs in the future as I have to wash them multiple times a week to re-use.
United StatesHi Andrew, Thank you for sharing your experience! We understand what it's like to have sweat marks come through your shirt, and we created this product to eliminate the negative feeling that goes along with this happening. I am so happy to hear that your Ejis undershirt is keeping you free from sweat stains all day! Have a great day, Merrielle Ejis Customer Support
Super happy thanks. Will order again.
CanadaHi Joe, Thank you for leaving a review. I am glad that you are super happy with your Ejis undershirt! Have a great day, Merrielle Ejis Customer Support
Great for those times I wear a nice shirt in the Texas heat to avoid a sweaty back mess.
United StatesHi Todd, Thank you for leaving a review! I am so happy to hear that your Ejis undershirt is keeping you dry in the Texas heat! Have a great day, Merrielle Ejis Customer Support
The T-shirts are amazing however you guys should make them with the front protection same as the back
Australia United StatesHi James, Thank you for leaving a review! I am so happy that you give your Ejis undershirt a thumbs up! Have a great day, Merrielle Ejis Customer Support
This is what I’ve been waiting for. An undershirt to protect my back from sweat marks on hot days. Great product.
United StatesHi Chris, Thanks for leaving a review! We understand what it's like to have sweat marks come through your shirt, and we created this product to eliminate the negative feeling that goes along with this happening. I am so happy to hear that your Ejis undershirt has been protecting your back from sweat marks on hot days! Have a great day, Merrielle Ejis Customer Support
As a sufferer of hyperhidrosis where my main problem is my mid-to-lower back, I have tried everything I could think of to hide the pools of sweat that would gather near the small of my back. Prescription strength antiperspirants, prescription pills, dri-fit & moisture-wicking undershirts - nothing could stop the embarrassing sweat marks from showing all over my back. It got to the point where I could only wear dark colored shirts, would need to carry 1-2 undershirts with me wherever I went, and would find any excuse to be the last person to leave the room so not to show my back sweat marks. While I have had success with Ejis undershirts to relieve the stress of worrying about underarm sweat but still could not contain my back sweat. I am so happy that Ejis developed the Back & Underarm Sweat Proof shirt! The first time I tested out this shirt I put it to the test - a baby blue dress shirt under a suit coat on a hot day! Throughout the day wearing the shirt, I could feel my back sweating and pooling near the small of my back. Thinking there was no way I didn't sweat through another "sweat-proof" shirt, I went to check and was in pure disbelief when I looked in a mirror to find that not a single drop of sweat was showing on my dress shirt! Normally I would keep my dark colored suit coat on the entire day no matter the temperature just to hide the sweat marks, but after lifting both arms and a couple of twirls in the mirror, with not a drop of sweat to be seen, I ditched the jacket and confidentiality went about my day without a second thought of showing embarrassing sweat marks! I highly recommend the Ejis Back & Underarm Sweat Proof shirt to anyone who suffers from underarm or back sweat, for anyone who wants a little more protection for those high-activity or warm days, or for anyone who likes a little piece of mind knowing that this undershirt has you completely covered! I cannot thank Ejis enough!
United StatesHi Jacob, Thank you for sharing your experience! We understand what it's like to have sweat marks come through your shirt, and we created this product to eliminate the negative feeling that goes along with this happening. I am so happy to hear that your Ejis undershirt with full back protection has been relieving the stress of sweat marks on your back and given you peace of mind. We appreciate the recommendation! Have a great day, Merrielle Ejis Customer Support
I've needed this full back protection undershirt for the longest time. It arrived and is simply incredible to wear! I never have to worry about having huge sweat patches across my back. The shirt protects the ENTIRE back as well as the underarms. It's super comfortable as it's made from the same fabric as the other EJis undershirts I have. Love this beyond words. Worth every penny.
United StatesHi Robert, Thank you for leaving a review! We understand what it's like to have sweat marks come through your shirt, and we created this product to eliminate the negative feeling that goes along with this happening. I am so happy to hear that you love your Ejis undershirt with full back protection! Have a great day, Merrielle Ejis Customer Support
