Men’s Slim Fit V-Neck Sweat-Proof Undershirt
94% Tencel, 6% Spandex with sweat-proof underarm shields
Style: #BSM04
Product family: Sweat-Proof Undershirts
Need help choosing? Call 1-800-498-7051, email customercare@kleinerts.com, or chat with us.
Feel Completely Confident!
This luxury feel, lightweight, slim-fitting, patented undershirt is the softest, most comfortable, best constructed and most effective undershirt made for sweat-proof protection against excessive underarm sweating and odors!
The body of these undershirts is made with a special luxury feel 94% Tencel and 6% Spandex.
Each garment is professionally hand-sewn.
These shields help keep your underarms dry and comfortable and help prevent perspiration from soaking through to your outer clothing or causing unsightly yellow staining. You also will not retain wetness against your skin so you won’t feel like you're wearing a sanitary pad.
Our enlarged, sweat-proof, multi-layered underarm shields, designed to block sweat from reaching your outer clothing, are constructed with a highly absorbent top layer of thirsty bamboo (2 x more absorbent than cotton) and soft, noiseless urethane waterproof protective barrier middle layer which stops sweat in its tracks. Because it is made with bamboo, a naturally anti-bacterial material, it dries out quickly so you feel drier and it helps prevent yellow stains.
Some other products are made with underarm shields constructed with only 100% cotton which keeps your underarms wet like a moist bulky sanitary napkin because it will not dry out quickly as bamboo does.
You will find these undershirts especially comfortable as you stay dry and confident all day.
We also designed each garment with extra length and some stretch to assure easy tucking and added comfort.
Each garment is totally discreet, noiseless and non-bulky.
A Perfect Fit!
Patented Sweat-Proof Undershirt Technology
- Sweat-Proof Underarm Shields: stops sweat wet-through to outer clothing and inhibits bacteria and odor. Feel comfortably protected with integrated, sewn-in enlarged Sweat Shields.
- Ultra Comfort: for everyday wear. Regular and Slim Fit styles available. Ring Spun Cotton or Tencel with 6% Stretch Spandex.
- Advanced, Patented Materials: using superior materials provides optimum protection. Non-bulky, quiet fabrics.
- Available in crew-neck, V-neck and deep V-neck styles.
- Underarm shields: 3 layers including water-proof, noiseless urethane barrier. Water-proof, stain-proof and anti-bacterial protection.
- Comfort-blended: Ring Spun Cotton or 94% Luxury Tencel with 6% Spandex.
- Machine washable.
- Extra length added: 2" extended length for enhanced comfort.
- Top quality, hand-sewn. USA made.

HSA/FSA Eligibility
Kleinert’s sweat-proof undershirts may be eligible for HSA/FSA reimbursement with a Letter of Medical Necessity. Check with your plan administrator.
Frequently asked questions
1. What is the best undershirt for men who sweat excessively?
Kleinert’s Men’s Sweat-Proof Undershirts are designed for men who experience excessive underarm perspiration and want to prevent embarrassing sweat marks on their clothing. Featuring integrated, enlarged sweat-proof underarm shields, these undershirts help prevent perspiration from soaking through to dress shirts, business attire, and everyday clothing.
2. Do Kleinert’s sweat-proof undershirts really prevent sweat stains?
Kleinert’s undershirts feature built-in protective underarm shields designed to block sweat from reaching outer clothing. This helps prevent visible wet patches and yellow underarm stains, keeping shirts looking cleaner and fresher.
3. What makes Kleinert’s sweat-proof undershirts different from regular undershirts?
Unlike ordinary undershirts, Kleinert’s sweat-proof undershirts feature specially designed integrated underarm shields. These protective shields help stop underarm moisture from transferring to outer clothing. Kleinert’s combines this protection with comfortable fabrics and practical everyday styling.
4. Can Kleinert’s undershirts help men with excessive sweating or hyperhidrosis?
Kleinert’s sweat-proof undershirts can be a useful clothing solution for men experiencing excessive underarm sweating, including those with hyperhidrosis. Although they do not stop the body from producing sweat or treat the underlying condition, their protective underarm shields help prevent perspiration from showing through outer garments.
5. Can I wear a Kleinert’s sweat-proof undershirt under a dress shirt or business suit?
Yes. Kleinert’s sweat-proof undershirts are designed to be worn discreetly beneath dress shirts, business suits, and casual clothing. Their built-in underarm protection helps men maintain a neat, professional appearance throughout the day.
6. What styles of men’s sweat-proof undershirts does Kleinert’s offer?
Kleinert’s offers several styles of men’s sweat-proof undershirts, including crew neck, V-neck, and deep V-neck options. Regular-fit and slim-fit selections allow customers to choose the style and fit that best suits their clothing and personal preferences.
7. Are Kleinert’s sweat-proof undershirts comfortable for everyday wear?
Yes. Kleinert’s sweat-proof undershirts are designed to combine protective underarm shields with comfortable fabrics. The slim-fit collection features a luxurious blend of 94% Tencel and 6% Spandex for a soft, flexible feel and a close-to-the-body fit.
8. Do sweat-proof undershirts help prevent yellow stains on white shirts?
Kleinert’s sweat-proof undershirts create a protective barrier between underarm perspiration and outer clothing. By reducing contact between perspiration and dress shirts, they help protect against the moisture and residue that can contribute to yellow underarm staining.
9. Are Kleinert’s sweat-proof undershirts available in slim fit and regular fit?
Yes. Kleinert’s offers both regular-fit and slim-fit sweat-proof undershirts. The regular-fit styles provide comfortable everyday coverage, while the slim-fit styles offer a more tapered silhouette that fits closer to the body.
10. Where can I buy Kleinert’s men’s sweat-proof undershirts?
Kleinert’s Men’s Sweat-Proof Undershirts are available online at Kleinerts.com. Customers can explore regular-fit and slim-fit styles, compare necklines, and choose the undershirt that best meets their needs.
11. Are Kleinert’s sweat-proof undershirts HSA/FSA eligible?
Kleinert’s sweat-proof undershirts may be eligible for HSA/FSA reimbursement with a Letter of Medical Necessity from your doctor, for example for a diagnosed condition such as hyperhidrosis. Check with your plan administrator before purchasing.
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