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Vermillion: Mass




Engineered for Athletes Only From The Ground Up. Go Earn It.


30-Day Hassle Free Return Period for Your Peace of Mind.


The World's Best Tailoring for The World's Best Athletes


- Vermillion Red Mass Fit Men's Shirt
- Windsor Collar
- Long Sleeve

    We challenge you to find a better fitting shirt.

    We have designed the perfect cut to accommodate real mass. What does that mean? It means this shirt will fit broad shoulders, a big back and a wide core. This is not a shirt for your average gym-goer - this is a shirt for true athletes that carry true mass.

    The Diamond Theory Cut

    Put simply, there is no other shirt on the planet that is cut like this. The Diamond Theory cut was the result of over 3 years of research a development. Years spent studying muscle bellies, body contour, insertions and movement, in order to develop garments that truly accommodate real muscle and mass. Tens of thousands of gym hours go in to developing your body, so the same should have went in to developing your clothes to help show it off.


    Our shirts are made of 97% cotton and 3% elastane. Why? Simply put, because this is the best fabric blend to use. Cotton is lightweight and breathable, which means you are comfortable and don’t overheat. We use a small amount of elastane to allow for a little bit of stretch to aid comfort. We don’t use too much so the fabric remains lightweight, breathable and of the highest possible quality.

    Earn The Shirt.

    We can't say it enough: this is not a shirt for the average gym-goer. This shirt has been engineered from the ground up specifically for athletes and committed fitness enthusiasts who carry real muscle and mass. Before you order, please make sure you measure yourself and choose your size according to the size guide. Take your chest measurement and your waist measurement. No need to order a size down for a tighter fit, no need to guess - your hard work was done in the gym, so we've made it as easy as possible you to find what we believe to be the best fitting shirt on the market. After all, we'd hate for you to suffer the embarrassment of a realisation that you have not yet earned your shirt.

    Athletes only. Earn the Shirt.

    The Diamond Theory cut is like no other on earth - our own proprietary cut that took over 3 years of research and development. Our clothes are not for the average Joe. They are not for your newbie gains. Our clothing was specifically designed and engineered for true athletes. It's for this reason we urge you to check our size guide and measure up - we'd hate for you to suffer the embarrassment of a realisation that you have not yet earned your shirt. Muscle Fit Size Guide Mass Fit Size Guide