STRATA BX Armor - 420 GSM Washed Structured Boxy T-Shirt
Structure in Its Purest Form.
STRATA BX Armor is a 420 GSM washed structured boxy T-shirt made from 100% GOTS-certified organic cotton single jersey. Built around a compact architectural silhouette, it combines substantial fabric weight with the clean, tactile character of unbrushed cotton.
Sharing the same foundational pattern and structural crafting as MX Signature, BX Armor features controlled dropped shoulders, wide straight sleeves, Mobilon shoulder reinforcement, and high-temperature dimensional stabilization.
Unlike the softly brushed MX surface, BX Armor retains the original unbrushed jersey texture, allowing the dense cotton construction to remain visible and tactile.
The STRATA Collection introduces a separate controlled washed finish, adding subtle tonal variation and a restrained, weathered character to Burnt Umber and Dark Earth.
Finished with raised white 3D tiger-head embroidery and a discreet woven side label, BX Armor expresses material, proportion, and structure without excess.
420 GSM Organic Cotton Jersey.
Structured Boxy Fit.
Unbrushed Surface × STRATA Washed Finish.
Specification
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
Unbrushed cotton jersey
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
Unbrushed Jersey - The Structured Expression
BX Armor retains the unbrushed surface of our 420 GSM high-density organic cotton single jersey. Its visible knit texture and substantial fabric body create a direct, material-focused expression of the heavyweight T-shirt.
Where MX Signature introduces Triple Carbon Peach for a softer tactile character, BX Armor preserves the natural surface definition of dense cotton jersey.
STRATA Washed Finish - Controlled Material Depth
STRATA adds a separate controlled washed finishing process to BX Armor, introducing subtle tonal variation and a restrained weathered appearance without excessive distressing.
Burnt Umber: A warm, deep oxidized brown inspired by mineral and earthen surfaces.
Dark Earth: A darker, grounded brown with understated tonal variation.
Architectural Construction
BX Armor uses our compact Architectural Boxy pattern, incorporating controlled dropped shoulders, wide straight sleeves, and a balanced, full-length body.
Mobilon shoulder reinforcement and high-temperature dimensional stabilization form part of its structural engineering, shared with MX Signature.
The result is a heavyweight essential defined by a clean, unbrushed surface, intentional proportions, and considered construction.
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
