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Diamond Theory Clothing

The Sky Blue Mass Fit Shirt

Regular price £90.00 GBP
Regular price Sale price £90.00 GBP
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The Shirt

THE SKY BLUE — LIGHT BLUE MUSCLE FIT DRESS SHIRT FOR ATHLETES

The Sculpted Sky reimagines the classic light blue dress shirt through the lens of power, precision, and presence. Designed exclusively for the built elite — bodybuilders, strength athletes, and men with pronounced musculature — this is the quintessential muscle fit shirt that balances elegance with engineered structure.

Tailored with a sharp athletic taper, this dress shirt for bodybuilders is cut to embrace the physique: broad across the chest and shoulders, narrowing at the waist to sculpt the ideal V-tapered silhouette. The result is a commanding form that moves with grace and authority.

The real distinction lies in the fine square-pattern weave, barely visible at a glance, but remarkably effective in accentuating muscular shape. Light plays subtly off the pattern, drawing attention to the contours of your upper body — enhancing the arms, chest, and back — while maintaining a professional, understated tone ideal for the workplace.

Crafted from a luxurious stretch cotton-blend, the shirt offers exceptional breathability, softness, and movement. A hidden logo preserves the clean, corporate-ready aesthetic — making it perfect for the boardroom, business travel, or elevated daily wear.

FEATURES

Muscle fit shirt tailored for athletic and muscular physiques

Aggressively tapered cut from chest to waist for a sculpted silhouette

Soft stretch cotton-blend with a refined square-pattern weave

Weave subtly highlights muscle definition for enhanced form

Wrinkle-resistant and breathable for all-day comfort

Hidden logo detail for a clean, office-ready appearance

Perfect as a dress shirt for athletes, professionals, and power-dressers alike

Precision in Every Thread. Form in Every Fit.
The Sky Blue is your definitive tailored athletic shirt — refined, powerful, and made for the modern man who dresses with intention.

What is My Fit?

Diamond Theory has 2 Fits for shirts:

Muscle and Mass

  • Muscle: This fit is designed with Bodybuilders in mind as this has an aggressive taper, bringing it right in at the waist.
  • Mass: This fit is designed with Strongmen in mind as this has a less aggressive taper as Strength Athletes tend to have a thicker core.

Please take this as a reference and refer to the size guide with your measurements.

Sizing

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

This shirt has been engineered from the ground up specifically for real athletes who carry real muscle and mass. Designed to drape and flow like a shirt should.

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.

Suggestion: If you are at the top of a size bracket, opt for the size up.

Shirts

For the Bodybuilders:

Size Guide, Muscle Fit, Muscle Fit Shirt, Muscle Size Guide

 

 

For the Mass Monsters:

 Jerseys

Our Training Fit Size Guide:

 

Materials

premium, breathable cotton-blend fabric, the material offers a luxurious drape that flows effortlessly over muscle while maintaining structure. The result? A shirt that feels like it was custom-made, every time you wear it.

Shipping & Returns

Free Shipping over £50
For returns please see returns policy for further detail

Care Instructions

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

  • Free Shipping over £50