STRATA WX Core - 420 GSM Washed Oversized T-Shirt
A New Everyday Weight. Effortless Proportion.
STRATA WX Core is a washed 420 GSM oversized cotton T-shirt crafted from 100% GOTS-certified organic cotton single jersey. Designed as our essential Full-Length Oversized Relaxed silhouette, it combines a roomier body, naturally dropped shoulders, and extended sleeves with the substantial drape of heavyweight cotton.
The unbrushed jersey preserves the natural definition of the dense knit, offering a clean, material-focused surface without additional mechanical brushing.
A standard clean hem, finished with a folded edge and double-needle stitching, maintains an uninterrupted line from the body to the hem. The silhouette remains relaxed and full-length, without a ribbed waistband or cropped proportions.
Exclusive to the STRATA Collection, an additional controlled washed finish introduces subtle tonal variation and restrained material depth across Burnt Umber and Dark Earth.
Each T-shirt is finished with raised white 3D tiger-head embroidery and a discreet REALLY COOL® woven side label.
420 GSM Organic Cotton Jersey.
Full-Length Oversized Relaxed Fit.
Standard Clean Hem.
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
Shared Wash Foundation
GOTS Integrity Wash
Collection Treatment
STRATA controlled washed finishing
Silhouette
Full-Length Oversized Relaxed
Shoulder Design
Natural relaxed drop shoulder
Sleeve Construction
Extended relaxed sleeve proportion
Hem Construction
Standard clean hem, approximately 1.5 cm
Hem Stitching
Folded edge with double-needle stitching
Branding
Raised white 3D tiger-head embroidery
Colorways
Burnt Umber / Dark Earth
Gender
Unisex
The Relaxed Expression - Full-Length Oversized
WX Core is built around our Full-Length Oversized Relaxed pattern, designed with a roomier chest, naturally dropped shoulders, and extended sleeves.
The longer body and relaxed proportions allow the substantial 420 GSM cotton jersey to drape naturally without relying on a cropped or tightly structured silhouette.
Standard Clean Hem - An Uninterrupted Silhouette
A clean folded hem with double-needle stitching completes the garment without introducing a contrasting ribbed structure.
Finished at approximately 1.5 cm, the hem follows the natural width of the body, maintaining a relaxed, straight appearance.
Unlike EX Essential, WX Core does not use a separate ribbed-knit hem.
Unbrushed Jersey - Natural Cotton Texture
The unbrushed surface retains the visual definition of the dense single jersey knit, allowing the fabric's natural cotton character to remain the focus.
STRATA Washed Finish - Earth-Inspired Depth
An additional controlled washed finishing process introduces subtle tonal variation and a restrained weathered appearance.
Burnt Umber: A warm, deep oxidized brown inspired by mineral and earthen surfaces.
Dark Earth: A darker, grounded brown with understated tonal variation.
Everyday Proportion, Considered Material
WX Core shares its Oversized Relaxed pattern with EX Essential, providing the same intended body proportions with a simpler, standard clean hem.
The result is a substantial everyday T-shirt defined by natural drape, balanced volume, and the material-led identity of STRATA.
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.
Full-Length Oversized Relaxed Fit - EX Essential / WX Core
Designed for a longer, roomier silhouette with dropped shoulders, extended sleeves, and a natural, relaxed drape.
EX Essential and WX Core share the same Oversized Relaxed base pattern and finished garment proportions.
EX Essential introduces a refined 2.5 cm ribbed hem, while WX Core features a clean, approximately 1.5 cm double-needle stitched hem.
Both maintain a deliberately oversized, full-length silhouette without a cropped proportion.
Size Reference
Our sizing is intentionally generous. Size M is developed around wearers who typically choose men's XL in many US or European brands, with additional volume and length built into the Oversized Relaxed pattern.
Because this fit is roomier than our Architectural Boxy series, we recommend comparing the finished measurements rather than relying on conventional size labels.
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
63
74
55
23.5
S
68
76
57
24.5
M
73
78
59
25.5
L
78
80
61
26.5
XL
83
82
63
27.5
2XL
88
84
65
28.5
How to Measure
Measure around the fullest part of your chest with the measuring tape level and relaxed.
For the most accurate fit comparison, measure a T-shirt you already own and compare the chest width, body length, shoulder width, and sleeve length with our finished garment measurements.
Understanding Our Fits
MX Signature / BX Armor - Architectural Boxy: A more compact full-length proportion with structured chest volume, controlled dropped shoulders, and wide straight sleeves.
WX Core / EX Essential - Oversized Relaxed: A longer, wider silhouette with extended sleeves, relaxed shoulders, and naturally flowing volume.
Both pattern blocks are intentionally generous and designed as unisex garments.
The difference is in proportion, structure, and drape, not simply a larger size.
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
