Our starting point is a dense, 420 GSM organic cotton single jersey. The weight gives the fabric substance. Its knitted construction allows it to bend and follow the body. The pattern determines how that fabric sits when worn, while finishing changes its surface and hand feel.
These elements work together. None tells the whole story on its own.
The same fabric foundation can feel noticeably different depending on what happens after knitting.
Triple Carbon Peach - MX Signature
A Softer Touch. A Matte Surface.
MX Signature undergoes three stages of mechanical brushing, raising a fine surface that softens the hand feel and creates a muted, matte appearance.
Unbrushed - BX Armor, EX Essential, WX Core
The Original Knit, Unbrushed Jersey.
Without the Triple Carbon Peach treatment, the jersey retains the character of its original knitted surface.
The result is a clean cotton face with a more direct feel of the fabric beneath.
Washed Finish - STRATA Collection
Color with Depth.
STRATA introduces a controlled washed finish to its Dark Earth and Burnt Umber jersey garments. The treatment creates variations in tone, bringing more depth to the fabric without relying on a heavily distressed appearance.
It is an additional finishing process, not a separate jersey construction.
Heavyweight Essentials by Category.
One jersey, ten garments. The same 420 GSM organic cotton jersey runs through T-shirts, long sleeves, henleys, crewneck and raglan sweatshirts, hoodies, sweatpants and shorts.
What changes is the pattern, the finish and the construction.
Heavyweight T-Shirts.
The reference garment.
Density gives the shoulder and chest a defined outline, in two fits, Architectural Boxy and Oversized Relaxed.
Heavyweight Long-Sleeve T-Shirts.
Weight carries a full sleeve and keeps the line from shoulder to cuff clean.
Heavyweight Crewneck Sweatshirts.
Sweatshirt weight in a smooth single jersey.
Heavyweight Pullover Hoodies.
A hooded pullover in dense jersey, designed to hold its shape.
Heavyweight Long-Sleeve Henleys.
A buttoned placket in dense jersey, for a neckline with more structure than a crew.
Heavyweight Raglan Crewneck Sweatshirts.
Raglan seams run from the collar to the underarm, giving the shoulder room to move.
Heavyweight Full-Zip Hoodies.
A dense jersey layer with a full-length zip, made for layering.
Heavyweight Straight-Leg Sweatpants.
Drape comes from weight. VOID's tonal embroidery keeps the leg line clean.
Heavyweight Wide-Leg Sweatpants.
A wide leg in dense jersey, for movement and drape.
How Shape Is Made. Details You Can Feel. The neckline, shoulder seams, sleeve openings and hem all change the experience of wearing a garment.
Some details help reinforce an area under strain.
Others change the way fabric sits against the body.
The aim is not to make every piece feel identical. It is to give each design a clear shape and a reason for its construction.
Beyond Jersey, Independently Designed.
Where the jersey stops, the design continues.
In STRATA collection, two pieces are developed on their own terms, each with its own fabric, pattern and construction.
Wide-Leg Cargo Trousers.
A wide-leg trouser in washed Burnt Umber, built around utility.
Flap pockets sit along each leg, side adjusters with metal buckles refine the waist, and seamed knee panels shape the leg.
The washed surface carries a mottled, tonal depth.
Zip-Up Track Jackets.
A black zip-up track jacket with earthy-tone panels cut on a curve and outlined in white dashed topstitching.
Shoulder tape stripes, a stand collar, a full-length zip and elasticated cuffs and hem give it a sport silhouette.
One master design, with Dark Earth or Burnt Umber panels.
The Garments You Can Rely On.
Everyday life, never ordinary.
Washing: After 50 washes, length changed by −0.9% and width by −1.1%, against a limit of 3%. On a size M Architectural Boxy, 74 cm long, −0.9% is about 0.7 cm.
Twisting: Spirality is how far a knit twists after washing. Ours was negligible.
Pilling: Fuzzing is graded from 1 to 5, where 5 is the best result. Ours is 4–5.
Crocking: This is colour transferred by rubbing. Dry rubbing is 4–5. Wet rubbing is 3, against a requirement of 2.5 for deep shades.
Bursting: Our jersey measured 1,143 kPa, about 1.4 times the 827 kPa we require.
Results describe tested material samples under the specified conditions. 420 GSM is REALLY COOL®'s specified fabric weight.
The Tactile Paradox Details
A heavyweight garment is not automatically a better garment simply because it uses more fabric.For REALLY COOL®, the value comes from a combination of material specification, pattern development, finishing, construction and quality verification.The Material: 420 GSM organic cotton single jersey provides the foundation for our core heavyweight range.The Pattern: Different garment shapes are developed for different wearing experiences, rather than relying on one oversized pattern for every product.The Finish: MX Signature adds three-stage mechanical brushing. STRATA adds a washed finish to its jersey designs. These finishing processes create differences you can see and feel.The Construction: MX Signature and BX Armor include reinforced shoulder construction and dimensional stabilization. EX Essential and WX Core follow a different design approach, with distinct hem treatments.The Verification: Independent laboratory testing provides measured information about the jersey's performance. GOTS certification documentation and applicable textile safety and compliance records support the materials and products identified within their respective certification scopes.Together, these choices explain why the garments differ in construction, feel and price.The objective is straightforward, clothing you enjoy wearing, with quality you can examine beyond the label.
GSM stands for grams per square meter. It measures the weight of a fabric over a defined area.At 420 GSM, our signature jersey is approximately twice the weight of a typical 200–220 GSM T-shirt jersey.Weight gives a sense of substance, but does not determine quality on its own. Yarn, knitting, finishing and construction also matter.
420 GSM is a substantial fabric. It will generally feel heavier and can feel warmer than much lighter jersey.We use a single jersey construction rather than automatically relying on a double-knit fabric to achieve our chosen weight.However, comfort depends on the weather, activity, garment fit and individual preference. A heavyweight cotton garment is not intended to perform like a lightweight technical cooling fabric.For a closer look at the differences between knit constructions, read Beyond the Interlock Myth →
Single jersey is a knitted fabric structure with a distinct face and reverse.It is commonly used in T-shirts, but its weight, density and surface can vary greatly depending on the yarn and knitting specification.Our core jersey is developed at a 420 GSM fabric weight.
Cotton jersey can change dimensions when washed.In laboratory testing under ISO 6330 conditions, our tested material recorded changes of −0.9% in length and −1.1% in width after 50 wash cycles.These figures describe the tested samples and are not a guarantee of identical results for every garment or home washing condition.
GOTS addresses organic textile processing and certification across the applicable supply chain.OEKO-TEX® STANDARD 100 focuses on testing textiles for specified harmful substances.They answer different questions.Any certification claim should be read together with the applicable certificate, covered article and certification scope.
Machine wash cold, at 30°C maximum, with similar colors and the garment turned inside out.Wash dark colors separately.Do not bleach or tumble dry.Reshape gently and line dry in the shade.If ironing is permitted by the garment's care label, use low heat on the reverse and avoid direct contact with embroidery.Always follow the instructions on the individual care label.
The series share a core jersey foundation, but not every garment goes through the same processes.MX Signature adds Triple Carbon Peach brushing and uses the Architectural Boxy construction system.BX Armor retains the unbrushed jersey surface while sharing the same underlying Architectural Boxy pattern and reinforced construction.EX Essential and WX Core use the longer Oversized Relaxed pattern, differentiated by their hem treatments.Collection-specific finishes, including STRATA's washed treatment, introduce further differences.Each product page identifies the materials, features and finishing processes included in that garment.
There is no single standard, but heavyweight usually describes jersey noticeably heavier than everyday T-shirts. Ours is 420 GSM.
Crocking is color transferring from a fabric when it is rubbed. It is tested dry and wet. Ours is Grade 4–5 dry and Grade 3 wet.
Pilling is the small balls of fibre that can form on a fabric's surface. It is graded from 1 to 5, where 5 is the best result. Ours is Grade 4–5.
They describe our 420 GSM organic cotton jersey under the specified conditions.Cargo trousers and the track jacket are independent designs with their own materials, and the results do not apply to them. Each product page lists its own specifications.
From the Journal.
Notes on fabric, fit, construction and the thinking behind what we make.
