SIGNAL MX Signature - 420 GSM Heavyweight Boxy T-Shirt

420 GSM. Substantial by Nature. Refined by Design.

MX Signature is constructed from our 420 GSM high-density organic cotton single jersey, developed as the material foundation of the REALLY COOL® heavyweight T-shirt platform.

The dense knit structure provides natural body and substantial weight, while MX's exclusive finishing process creates a uniquely softened surface.

The Triple Carbon Peach Difference

The exclusive three-stage mechanical brushing process softens the surface of the heavyweight cotton jersey, creating a refined, peach-like hand feel.

The finish diffuses surface highlights and introduces a subtle, matte tactile character.

Unlike the natural unbrushed surfaces of BX Armor, EX Essential, and WX Core, MX Signature is designed around this distinct sensory expression.

Shared Foundation. Exclusive Finish.

The fabric weight remains consistent with our wider T-shirt platform. The distinction is created through finishing and structural engineering, not a heavier numerical GSM value.

MX Signature - The Tactile Expression

MX Signature represents the most tactile interpretation of our heavyweight jersey platform.

Its identity is created through a combination of material finishing, engineered construction, and architectural proportion.

• Triple Carbon Peach Finish

The 420 GSM organic cotton jersey undergoes three-stage mechanical brushing to develop a refined, peach-like surface.

The result is a softened, matte tactile expression that distinguishes MX Signature from our unbrushed series.

• Architectural Boxy Silhouette

A broad, structured body with a shorter, non-cropped length creates a balanced, intentional silhouette.

Subtly dropped shoulders, wide straight sleeves, and a clean horizontal hem complete the proportions.

• Mobilon Shoulder Reinforcement

Mobilon reinforcement is incorporated into the shoulder construction to support the engineered silhouette and help control unwanted distortion during wear.

• Heat-Setting Process

An additional high-temperature setting stage forms part of the MX engineering process, supporting the intended dimensional and structural consistency.

• Reinforced Construction

Selected construction areas incorporate reinforced three-needle, five-thread stitching.

A carefully developed collar profile, including an expanded rib width, contributes to the finished shape and appearance.

• Contrast 3D Embroidery

The SIGNAL collection expresses our raised tiger-head emblem through deliberate color contrast.

1. Black garments feature white embroidery.

2. White garments feature black embroidery.

The raised embroidered details introduce depth and unmistakable recognition without relying on a large printed graphic.

Considered Finishing Details

A standard clean jersey hem, internal neck labeling, and discreet side-seam branding complete the construction.

Built Around Structure. Finished for Touch.

MX Signature balances a substantial textile foundation with a distinctive tactile surface, engineered proportions, and recognizable visual identity.

Our 420 GSM organic cotton jersey has been evaluated through laboratory testing for dimensional stability, fabric strength, pilling resistance, and color fastness.

Built Around Measurable Standards

Beyond its substantial 420 GSM fabric weight, our organic cotton jersey is evaluated for dimensional stability, fabric strength and surface appearance.

Results reflect laboratory-tested samples and their specified testing conditions.

Actual garment performance may vary with wear, laundering, and care practices.

Architectural Boxy Fit - MX Signature / BX Armor

Designed for a compact, structured silhouette with generous chest volume, controlled dropped shoulders, wide straight sleeves, and a shorter, full-length body.

MX Signature and BX Armor share the same Architectural Boxy pattern. Both are intentionally oversized in their size designation, with a refined, structured shape rather than excessive length or loose, flowing fabric.

Size Reference

Our size M is developed around the body proportions of a wearer who typically chooses men's XL in many US or European brands, while delivering our intended Architectural Boxy silhouette.

International sizing varies by brand. Always compare your body measurements and the finished garment specifications before choosing your size.

Unisex Size Guide - Recommended Body Chest

Finished Garment Measurements (cm)

How to Measure

Measure around the fullest part of your chest, keeping the measuring tape level and relaxed.

For the most reliable comparison, lay a T-shirt you already own flat and compare its chest width, body length, shoulder width, and sleeve length with our finished garment measurements

Understanding Our Fits: MX / BX versus WX / EX

MX Signature & BX Armor - (Architectural Boxy )

• More compact body proportion

• Generous but controlled chest volume

• Controlled dropped shoulders

• Wide, structured sleeves

• Shorter, non-cropped body length

EX Essential & WX Core - (Oversized Relaxed)

• Longer, full-length silhouette

• Roomier chest

• More relaxed shoulder drop

• Extended sleeves

• Natural, relaxed drape

MX/BX and WX/EX use different pattern blocks and have separate size specifications. A size M in one fit should not be assumed to have identical garment measurements in the other.

All four series are designed as unisex garments.

Fabric Composition

• 100% Organic Cotton

• 420 GSM High-Density Single Jersey

• Exclusive of Decoration

Garment Care

• Machine wash cold (maximum 30°C).

• Do not bleach.

• Iron on the reverse side only.

• Do not tumble dry.

• Line dry in the shade.

Follow the care instructions to help maintain the garment's appearance, surface finish, and shape over time.

Tested Fabric Performance

• Shrinkage specification: ≤3.0% (AATCC 135 / ISO 6330).

• Pilling resistance: Grade 4.5 (ASTM D3512 / ISO 12945-2).

• Color fastness: Laboratory verified (AATCC 8 / ISO 105-X12).

Shared Foundation. Distinct Craftsmanship. Intentional Expression.

Every REALLY COOL® T-shirt begins with a shared 420 GSM organic cotton jersey platform.

Each series develops that foundation through a different combination of fit, surface finishing, and construction.

• MX Signature - The Tactile Expression

A structured silhouette combined with our exclusive three-stage mechanical brushing finish.

• BX Armor - The Structured Expression

The same Architectural Boxy foundation with a clean, unbrushed surface and reinforced construction.

• EX Essential - The Refined Expression

A full-length relaxed silhouette distinguished by a refined ribbed hem.

• WX Core - The Relaxed Expression

A full-length oversized silhouette with a standard clean hem and simplified construction.

***All STRATA collections receive an additional controlled washed finish in their respective earth-inspired colorways.

Worldwide Shipping

REALLY COOL® offers shipping to selected destinations worldwide.

Shipping methods, estimated delivery times, and applicable charges are displayed at checkout.

Orders are typically processed within 1–3 business days after confirmation.

Returns & Exchanges

Eligible return requests must be submitted within 16 days of delivery, unless otherwise required by applicable consumer protection laws.

Returned products must meet our stated return conditions, including being unworn, unused, unwashed, and returned with original tags attached.

Exchanges are subject to approval, product availability, and destination requirements.

For full details, please review:

Shipping & Delivery | Returns & Exchanges