Pionyr Men
Pionyr™ Atlas Undershirt for Gyno
Pionyr™ Atlas Undershirt for Gyno
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About Ultra
Flattens and smooths your chest with PionyrCore Compression™
Completely discreet under clothing
Supports your daily life
Breathable and lightweight
- Durable, stretchy fabric
Specifications
Sizing: Men
Material: 80% Nylon + 20% Polyester
Color: Beige/Blue/Grey
Note: Atlas and Titan are the same products.
Size Guide
Size (L): 32"~35"(inch) / 86cm~96cm
Size (XL): 35"~38"(inch) / 96cm~106cm
Size (2XL): 38~41"(inch) / 106cm~116cm
Size (3XL): 41~44"(inch) / 116cm~126cm
Shipping
Orders are processed within 1-3 business days. Standard shipping within the U.S. typically takes 5-7 business days. Once your order ships, you'll receive a tracking number via email. While we strive for timely delivery, unforeseen delays may occur—we’ll keep you informed if that happens. If you have any questions or concerns, don’t hesitate to reach out at pionyrmen@gmail.com.
How to Return
Returning your order is simple and hassle-free:
- Email us your order details at pionyrmen@gmail.com.
- We'll send you a prepaid shipping label.
- Pack up your item securely.
- Request a USPS pick-up right at your doorstep.
- Your mail carrier will handle the rest.
- Once received, we’ll process your refund or send your exchange.
That’s it—quick, easy, and stress-free! 😊
What is PionyrCore Compression™?
PionyrCore Compression™ is our exclusive body-shaping technology, built to flatten your chest and belly instantly while keeping you comfortable all day.
Made with high-density elastic fabric, it provides firm, breathable support that smooths your torso for a natural, masculine look—without feeling tight or restrictive. Whether under a t-shirt or dress shirt, it keeps you looking sharp and confident with zero bulk.
Join 500+ Men Transforming Their Look Instantly!
If you feel self-conscious about your chest and belly, you're not alone.
Our compression undershirt helps you achieve a smoother, more masculine look instantly—without surgery or extreme workouts.
No More Manboobs
Struggling with chest insecurities? Our breathable compression vest flattens and firms instantly, helping you stand taller and feel more confident all day.
Shape Your Confidence
Sculpt your chest and core instantly with this slimming undershirt - designed to enhance your physique and boost your confidence as a man.
Seamless Shield
Achieve a sculpted look with total discretion. This lightweight, seamless vest stays invisible under any outfit, giving you a sharp, polished appearance with ease.
Let customers speak for us
Size Xl tightens my belly very good. I'd advice you to buy size up.
I purchased the slimming Titan undershirt. When I received it the left seam was torn. Contacted customer service and was asked to send a picture of the seam. I did and was told they would send a new one asap. I received it within 2 days!! Love the shirt and customer service is excellent. I will be buying more. I would recommend this product.
I have tried many compression undershirts, and wasn't pleased. Until I ordered this one. material is nice and my body can breath. Really satisfied.
I love these undershirts. I Initially had the XL and it gave me a big confidence boost whilst I was at the early stages of losing weight. They're very comfortable and not restrictive at all. I've lost enough weight to drop down to the L size and it's just as good.
Has flattened out the stomach a little but has really helped in the man boobs department, very comfortable to wear
I have a hernia above my naval and this undershirt supports it very well.
Very good quality in manufacturing materials, it is pleasant to use and a very good size, I will buy more.
Very good, I recommend it. I have already tested it and I really like it.
Excelente producto.. Lo que necesitaba para esconder un poco mi estómago.
Product of good quality, fast shipping. I’m wearing it all the time and I’m pleased with the results.
Para mi , 1,75 y 83 kilos.....la XXL viene justa, aunque es esa su misión , la de comprimir, algo de volumen visual reduce. Por el mismo motivo resulta algo incómoda de quitar y poner, pero es lo normal en este tipo de prendas. Vendedor muy recomendable
Excellent product. I'm really very fond of purchasing this product especially in light of the fact that it comes with responsibility for everything. Good price and comfortable, fast delivery and excellent tightning. Better.
Customer Reviews
Has flattened out the stomach a little but has really helped in the man boobs department, very comfortable to wear
Excellent product. I'm really very fond of purchasing this product especially in light of the fact that it comes with responsibility for everything. Good price and comfortable, fast delivery and excellent tightning. Better.
It is excellent, the material is fully elastic, I fully recommend the Atlas Undershirt, it arrived early, adviced for men who want to buy this shirt. I weigh 155 kilos and I stay excellent.
Perfect
Superb quality love it