Welcome to Performance: Diamond Theory. The top echelon of sports clothing. This is where performance meets luxury.
This masterpiece has been meticulously designed to exude style while honouring the your physique.

The cut is a testament to precision tailoring. Each seam is strategically placed to gracefully drape over muscles bellies, accentuating your frame with an unparalleled sense of refinement.

Crafted from the finest materials, this jersey does not compromise on performance. The fit ensures comfort, while its lightweight nature allows for effortless and unrestricted movement.

Elevate your identity with a symbol of distinction that speaks volumes. Join the league of connoisseurs who value not only performance but also the artistry behind it.

Our jerseys are made from 2 types of polyester. The jersey is made from an ultra-durable and cool fabric, whilst the side panels are made from a vented fabric.

This ensures maximum comfort and breathability during your workouts.

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For returns please see returns policy for further detail

Check our Size Guide. Select the size most accurate to your measurements.

This jersey has been engineered from the ground up specifically for real athletes who train properly. 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.

Shirts

For the Bodybuilders:

For the Mass Monsters:

 Jerseys

Our Training Fit Size Guide:

Wash on a low heat and air dry. Do NOT tumble dry.