Our size guide will help you find the perfect fit. If you have any questions, please use the chat icon below.
Our underwear and top sfits true to size and are fitted, however if you like your underwear/tops a little more relaxed, please size up.BOXER BRIEFS / BOXERS / TRUNKS / BRIEFS / JOCKS

Our underwear fits true to size and are fitted, however if you like your underwear a little more relaxed, please size up.
| WAIST SIZE | ||||||
S |
M |
L |
XL |
2XL |
3XL |
|
|
IN |
28-30 |
31-34 |
34-37 |
37-40 |
40-43 |
43-45 |
|
CM |
71-76 |
79-86 |
86-94 |
94-102 |
102-109 |
109-114 |
T-SHIRTS / TANK TOPS / VESTS

| CHEST SIZE | ||||||
S |
M |
L |
XL |
2XL |
3XL |
|
|
IN |
34-38 |
38-41 |
41-44 |
44-48 |
48-52 |
52-56 |
|
CM |
86-97 |
97-104 |
104-112 |
112-122 |
122-132 |
132-142 |
SHORTS / JOGGERS & PANTS
| WAIST SIZE | |||||
S |
M |
L |
XL |
XXL |
|
|
IN |
28-29 |
30-31 |
32-33 |
34-36 |
37-38 |
|
CM |
74-78 |
79-84 |
85-88 |
89-93 |
94-100 |
BRIEFS / SHORTS
| WAIST SIZE | |||||
S |
M |
L |
XL |
XXL |
|
|
IN |
28-29 |
30-31 |
32-33 |
34-36 |
37-38 |
|
CM |
74-78 |
79-84 |
85-88 |
89-93 |
94-100 |
Descripción
Descripción
Nuestra nueva colección innovadora que permite que toda nuestra tecnología patentada vuele bajo el radar sin ser detectada. Utilizamos nuevos procesos de fabricación inventivos que nos permiten ocultar y eliminar costuras. Esto es más que solo tecnología encubierta. El bestseller que da más volumen y definición a los glúteos, adaptándose perfectamente a cada forma corporal ahora en nuestra línea de fusión exclusiva SIN COSTURAS. Su diseño es práctico, discreto y cómodo. Puede usarse como underwear diario, para deportes, o es excelente cuando estás sentado por largos períodos de tiempo. ¡Siéntete genial en tu propia piel!
CARACTERÍSTICAS
- [PADDED Tech]®
- Diseño exclusivo patentado: USD876,750S y USD877,453S
- Relleno removible
- Volumen instantáneo en glúteos
- Boxer de entrepierna larga
- Costuras fusionadas indetectables
- Pretina elegante y discreta
- Durabilidad y comodidad
- Se adhiere a tu cuerpo en estilo Stealth
Composición
Composición
Cuidado
Cuidado
*Exclusive patented design: USD872,970S, USD877,453S
- Reviews
- Questions
- butt
- techs
- Thanks rounderbum
- aging
- coverage
- boxer briefs
- HIV meds
- equation
- 55356
- texture
Totally Love these
These are amazing espescially under dress pants or white linen pants in the summer/vacation
I Feel Good
Love these. I have several pairs of linen pats for the summer that are similar shade so these will work out great. They feel great as well.
Rounderbum USA
Thanks for wearing Rounderbum :)
Nice style and natural color
Stealth
Exactly what they claim it to be! Awesome product. With all 3 techs were included in one product.
Great fit
I put them on and received several compliments. They really do enhance one's butt
Our Techs
FAQ about shapewear
Do men use shapewear?
Do men use shapewear?
Men’s shapewear is on the rise — and for good reason.
More guys are asking, “Why should only women have these options?” From all walks of life, men are shopping shapewear to look and feel their best. Whether it’s smoothing love handles, lifting your butt with padded underwear, improving posture, or recovering post-surgery — men’s shapewear does it all. And let’s be honest — who doesn’t want a more toned, confident look?
Is it good to use shapewear?
Is it good to use shapewear?
There’s nothing wrong with wanting to feel your best — and men’s shapewear can help.
It’s great for improving posture, supporting post-surgery recovery, and boosting confidence for special events like weddings. Whether you’re looking for a more lifted look or just want extra comfort during long days, our men’s padded underwear delivers both support and style.
What does shapewear do?
What does shapewear do?
At Rounderbum, our goal is to help men everywhere feel great with shapewear.
But it does more than just boost confidence — our padded briefs add lift and volume to your butt, helping clothes fit better and adding comfort during long flights or desk time. Our compression shirts aren’t just for shaping your torso — they support better posture and are a great option for post-surgical recovery too. Shapewear isn’t just about looks — it’s about feeling good all around.





