Built-In Boost with Padded Tech – This performance muscle t-shirt for men features discreet removable chest and shoulder pads that enhance your silhouette instantly with padded shapewear effects—perfect for everyday wear, layering, or active styling Enhanced Upper Body Definition – Gone are the days of a flat chest; this padded shirt subtly sculpts your torso and amplifies muscle definition under tees, button-downs, or jackets while staying sleek and undetectable All-Day Comfort Fit – Made from a soft, stretchy blend of technical fabrics that move with your body while keeping their shape. Lightweight and breathable, it delivers lasting comfort and easy wear without bulk. Customizable Fit, Easy Care – Padding is removable for easy washing and mindset—strip it out to clean, then slip it back in for maximum impact. Adaptive structure meets practicality in everyday wear Designed for Every Body – Available in inclusive sizes S–XL and built for real movement. Rounderbum is on a mission to make shapewear that enhances your presence with minimal effort and maximum confidence The Rounderbum Stealth Muscle T-Shirt is engineered for subtle enhancement that makes a big impact. Designed with our patented Padded Tech, this tee features thin, removable pads placed at the chest and shoulders, giving your upper body instant definition and a stronger silhouette. The result is a natural boost that highlights your frame without ever looking artificial.

Unlike standard undershirts or workout tees, the Stealth Muscle T-Shirt is built to refine your look in any setting. Worn casually with jeans, layered under a blazer, or styled for a night out, it enhances your chest and shoulder line so clothes fit cleaner and proportions look sharper. The discreet design means the padding stays invisible beneath every layer—no bulk, no obvious add-ons—just a physique that looks naturally more defined.

The fabric blend is soft, lightweight, and breathable, moving with you throughout the day. With a smooth hand feel and just the right amount of stretch, it stays comfortable from morning into night. The pads are removable, allowing you to adjust your look based on the occasion—wear them for extra contour when you want to stand out, or take them out for a more relaxed fit.

Every detail of the Stealth Muscle T-Shirt is crafted to deliver confidence without compromise. Whether you’re dressing for work, stepping out on the weekend, or layering up for an event, it provides a subtle yet noticeable enhancement that helps you feel your best. Rounderbum’s mission is to design shapewear that empowers men with style, technology, and comfort, and the Stealth Muscle Tee is a perfect example of that philosophy.

Available in one color and five inclusive sizes—Extra Small, Small, Medium, Large, and Extra Large. Refer to the size chart to find your best fit and experience the difference of Rounderbum’s Padded Tech.
Care Made Simple:
Remove padding inserts before washing. Wash separately in cold water by hand or on a gentle machine cycle using mild detergent. Skip the bleach. You can use light fabric softener. Hang dry in the shade or tumble dry on low. Do not iron or wring.

Define your frame. Elevate your presence. Wear your confidence seamlessly.