STRATA MX Signature - 420 GSM Washed Heavyweight Boxy T-Shirt
Feel the Difference. A Study in Material and Form.
A richer touch of heavyweight cotton. STRATA MX Signature is a washed heavyweight boxy T-shirt combining our softly peached Triple Carbon Peach finish with the restrained depth of STRATA’s washed earth tones.
The architectural boxy fit is spacious through the chest with controlled dropped shoulders, straight wide sleeves and a slightly shorter, never cropped, body. Reinforced shoulder construction and additional shape-setting support the intended silhouette. The distinctive finish softens the touch without changing the underlying jersey weight.
STRATA adds a controlled washed finish to our heavyweight jersey, giving Dark Earth and Burnt Umber subtle variation and a lived-in depth of color. Raised white tiger-head embroidery provides a measured contrast.
420 GSM Organic Cotton Jersey.
Architectural Boxy Fit.
Triple Carbon Peach × STRATA Washed Finish.
Reinforced Neck & Shoulder Construction
A tactile take on the everyday heavyweight T-shirt. The garment you reach for without thinking.
Feature
Details
Material Composition
100% GOTS-certified organic cotton, exclusive of decoration
Fabric Weight
420 GSM heavyweight jersey
Knit Construction
High-density single jersey
Yarn Configuration
Premium 16s/1 and 21s/2 yarn system
Surface Finish
Triple Carbon Peach mechanical brushing
Collection Treatment
STRATA controlled washed finishing
Silhouette / Fit
Architectural Boxy
Shoulder Construction
Mobilon shoulder reinforcement
Dimensional Processing
High-temperature dimensional stabilization
Stitch Construction
Three-needle, five-thread reinforcement (3N5T)
Branding
Raised white 3D tiger-head embroidery
Colorways
Burnt Umber / Dark Earth
Gender
Unisex
Triple Carbon Peach - The Tactile Expression
MX Signature introduces an exclusive triple-stage mechanical brushing treatment to its 420 GSM organic cotton jersey. The process is designed to create a finely peached, low-reflection surface with a soft, suede-like tactile character while retaining the garment's substantial construction.
STRATA Washed Finish - Material Depth
Applied in addition to the MX surface treatment, STRATA's controlled washed finishing creates subtle tonal variation, a restrained weathered appearance, and greater visual depth across its earth-inspired colorways.
Burnt Umber: A warm, deep oxidized brown inspired by mineral and earthen surfaces.
Dark Earth: A deeper, grounded brown with understated tonal variation.
Architectural Construction
MX Signature shares its compact boxy pattern with BX Armor, incorporating a controlled dropped shoulder, straight body proportions, Mobilon shoulder reinforcement, and additional dimensional stabilization.
The result is a heavyweight T-shirt that combines deliberate structural proportions with a distinctive tactile surface.
Our 420 GSM organic cotton jersey has been evaluated through laboratory testing for dimensional stability, fabric strength, pilling resistance, and color fastness.
Performance Metric
Verified Result
Extended Wash Testing
50 consecutive wash-and-dry cycles
Length Dimensional Change
Approximately -0.9%
Width Dimensional Change
Approximately -1.1%
Dimensional Testing Standard
ISO 6330
Care-Label Shrinkage Specification
≤ 3.0% (AATCC 135 / ISO 6330)
Bursting Strength
1,143 kPa
Pilling Resistance
Grade 4–5 (care-label rating: 4.5)
Pilling Test Standards
ASTM D3512 / ISO 12945-2
Color Fastness
Laboratory verified
Color Fastness Standards
AATCC 8 / ISO 105-X12
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
Size
Chest (cm)
Chest (in)
XS
92–102
Approx. 36–40"
S
102–112
Approx. 40–44"
M
112–122
Approx. 44–48"
L
122–132
Approx. 48–52"
XL
132–142
Approx. 52–56"
2XL
142–152
Approx. 56–60"
Finished Garment Measurements (cm)
Size
Half Chest
Length
Shoulder
Sleeve
XS
58
70
53
21
S
63
72
55
22
M
68
74
57
23
L
73
76
59
24
XL
78
78
61
25
2XL
83
80
63
26
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.
Series
Fit
Distinctive Detail
MX Signature
Architectural Boxy
Triple Carbon Peach finish with reinforced construction
BX Armor
Architectural Boxy
Clean unbrushed jersey with reinforced construction
EX Essential
Oversized Relaxed
Refined 2.5 cm ribbed hem
WX Core
Oversized Relaxed
Standard clean folded hem
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
