SIGNAL BX Armor - 420 GSM French Terry Full-Zip Hoodie
The SIGNAL BX Armor 420 GSM French Terry Full-Zip Hoodie brings a bold, clean expression to our heavyweight essentials.
Made from organic cotton French terry, it retains a dense, unbrushed outer surface that highlights the fabric's natural knitted texture, with unbrushed cotton loops on the inside.
Designed in our Architectural Boxy Fit, the hoodie features a generous chest, dropped shoulders and full-length sleeves for a relaxed yet defined silhouette. The silver front zipper lets you wear it fully closed for a clean shape, partially open for a more casual look, or unzipped over a T-shirt for effortless layering.
A double-layer hood with adjustable, color-matched drawcords, two separate front pockets and substantial ribbed cuffs and hem bring everyday comfort and versatility to the design.
Unlike the softly peached finish of MX Signature, BX Armor preserves the natural character of the French terry face. SIGNAL introduces striking black-and-white contrast through two colorways: Black with raised white tiger-head embroidery and White with raised black tiger-head embroidery.
Finished with silver hardware and balanced proportions, this heavyweight organic cotton zip-up hoodie brings together clean texture, architectural form and a distinctive graphic identity for everyday wear.
Feature
Details
Product Family
420 GSM Signature Loopback Jersey
Main Fabric
3-End French Terry
Main Fabric Composition
100% Organic Cotton
Main Fabric Weight
420 GSM Heavyweight
Outer Surface
Dense, smooth jersey-appearance face
Inner Surface
Natural Unbrushed Loopback Reverse
Fit
Architectural Boxy
Shoulder
Dropped Shoulder
Sleeve Construction
Full-Length Set-In Sleeves
Hood
Adjustable Double-Layer Hood
Outer Hood Fabric
420 GSM Organic Cotton French Terry
Hood Lining
Color-Matched Organic Cotton Single Jersey, 220–260 GSM
Hood Drawcord
Color-Matched Braided Cotton
Drawcord Exits
Matching Low-Profile Fabric Eyelets
Cord Tips
Smooth Silver Metal Aglets
Front Zipper
Silver Size 5, One-Way Open-End Zipper
Front Pockets
Two Separate Angled-Entry Patch Pockets
Sleeve Cuffs
2×2 Ribbed, 7 cm
Bottom Hem
2×2 Ribbed, 7 cm
Rib Composition
95% Organic Cotton / 5% Elastane
Branding
Raised Contrast Tiger-Head Embroidery
Colorways
Black / White
Gender
Unisex
Sizes
XS / S / M / L / XL / 2XL
The body, sleeves, outer hood and two front pockets are made from our 420 GSM organic cotton French terry. The double-layer hood includes a lighter organic cotton jersey lining, while the cuffs and hem use a separate cotton/elastane rib for fit and recovery.
The 420 GSM fabric weight refers to the main French terry fabric, not the complete garment.
420 GSM French Terry - Substantial by Nature
This hoodie begins with our 420 GSM organic cotton French terry, developed with a dense, smooth outer surface and natural, unbrushed cotton loops on the inside.
Unlike a brushed fleece hoodie, the interior retains its knitted loopback character. The substantial fabric gives the garment body and presence while remaining comfortable for everyday wear and layering.
Clean Unbrushed French Terry - The BX Armor Character
BX Armor preserves the natural character of our 420 GSM organic cotton French terry, keeping the outer surface clean and unbrushed.
The dense knit reveals the fabric's original texture, giving the hoodie a refined, substantial appearance without an additional peaching finish.
Unlike the softly peached exterior of MX Signature, BX Armor lets the natural knit surface take the lead.
Inside, the cotton loops remain unbrushed, retaining the distinctive feel and texture of French terry.
The result is a heavyweight everyday layer defined by clean texture, balanced proportions and considered simplicity.
SIGNAL Contrast Design
SIGNAL explores the balance between bold graphic contrast and considered everyday design.
Built around a minimal black-and-white palette, the collection lets contrasting embroidery stand out against the clean proportions of our heavyweight essentials.
Black: A deep black body with raised white tiger-head embroidery, creating a distinct graphic statement against the unbrushed French terry surface.
White: A clean white body with raised black tiger-head embroidery, bringing clarity and definition to the minimal silhouette.
Both colorways retain the natural, unbrushed outer face of BX Armor, allowing the original knit texture and architectural silhouette to complement the contrasting artwork.
The silver zipper adds a subtle metallic detail, keeping the overall design balanced.
The result is a versatile everyday layer with a clear visual identity.
Architectural Boxy Fit - Defined, Yet Versatile
Built around our dedicated full-zip hoodie pattern, the silhouette features a generous chest, dropped shoulders and full-length set-in sleeves.
The substantial 420 GSM French terry gives the hoodie a defined shape, while the relaxed proportions leave room for comfortable movement and layering.
Designed to be boxy without being cropped or excessively oversized, the fit remains balanced whether the zipper is fully closed or left open.
The 7 cm ribbed cuffs and hem complete the shape with a clean, considered finish.
The 7 cm ribbed cuffs and bottom hem finish the silhouette without sharply tightening the wrists or waist.
Double-Layer Hood - Clean by Design
The double-layer hood features a substantial French terry exterior and a lighter organic cotton jersey lining.
Designed without drawstrings, eyelets or visible hardware, the clean opening keeps the neckline simple and lets the fabric and silhouette take the lead.
A carefully finished hood attachment provides a neat transition from the neckline to the hood.
Full-Length Silver Zipper - Three Ways to Wear
A silver front zipper creates a distinct vertical detail against VOID's tonal black and white designs.
Fully zipped, the hoodie presents a clean, symmetrical silhouette that highlights its architectural boxy proportions.
Partially unzipped, the neckline opens naturally for a more relaxed expression.
Fully open, it becomes an effortless layering piece over a T-shirt or another everyday essential.
The one-way, open-end zipper offers flexibility without compromising the hoodie's balanced shape.
Adjustable Double-Layer Hood - Comfort in the Details
The double-layer hood pairs a substantial French terry exterior with a lighter, color-matched organic cotton jersey lining.
Unlike our drawstring-free pullover hoodie, the full-zip design includes an adjustable drawcord, allowing the hood opening to be personalized for comfort and fit.
Color-matched drawcords and discreet fabric eyelets maintain a cohesive appearance, while smooth silver metal tips echo the front zipper.
The result is a functional hood that feels considered, without adding unnecessary visual complexity.
Two Separate Front Pockets - Balanced by Design
Two individual patch pockets sit on either side of the center-front zipper, each with an angled hand opening.
Made from the same 420 GSM French terry as the body, the pockets retain a consistent surface and color across the front of the garment.
Reinforced pocket openings and carefully placed stitching support everyday use, while the symmetrical design keeps the silhouette clean and balanced.
The pockets remain accessible whether the hoodie is fully zipped or worn open.
Our 420 GSM French terry is developed around defined standards for fabric weight, wash performance, surface durability and colorfastness.
Performance Metric
Standard / Method
Finished Main Fabric Weight
420 GSM ±5%
Fabric Weight Test
ASTM D3776/D3776M
Dimensional Change
No more than 5% in absolute length or width
Fabric Dimensional Change
AATCC TM135
Garment Dimensional Change
AATCC TM150
Garment Twist
No more than 3%
Garment Twist Test
AATCC TM179
Pilling Resistance
Grade 4 or higher
Pilling Test
ISO 12945-2
Wash Colorfastness
Grade 4 or higher
Washing Test
ISO 105-C06
Rubbing Colorfastness
Grade 4 or higher
Rubbing Test
ISO 105-X12
Beyond fabric performance, we check how the completed hoodie holds its shape and functions through everyday care.
The zipper, adjustable hood, drawcords, pocket openings, ribbed trims and embroidery are included in our garment-level quality checks.
We also assess zipper movement and front alignment, helping the hoodie maintain a balanced appearance whether worn closed or open.
These figures represent the confirmed performance standards of our French terry program, rather than separate numerical test results for every colorway.
For more on our approach to material quality, explore The Tactile Paradox.
Architectural Boxy Fit
The REALLY COOL® MX Signature and BX Armor full-zip hoodies share the same dedicated Architectural Boxy pattern, developed for the structure and weight of our 420 GSM French terry.
Both feature a generous chest, dropped shoulders, full-length set-in sleeves and a ribbed hem that completes the silhouette without excessive tapering.
The fit is intentionally roomy and substantial, but not cropped or excessively oversized.
Designed to work equally well fully zipped or open, the silhouette offers comfortable room for layering.
Size Reference
Our size M is designed for the body proportions of someone who commonly wears a men's XL in many US or European brands, while delivering the intended REALLY COOL® boxy fit
.
This is a fit recommendation, not a universal size conversion. For the best fit, compare the measurements below with a hoodie you already own.
Unisex Size Guide - Recommended Body Chest
Size
Chest (cm)
Approx. Inches
XS
92–102
36.2–40.2"
S
102–112
40.2–44.1"
M
112–122
44.1–48.0"
L
122–132
48.0–52.0"
XL
132–142
52.0–55.9"
2XL
142–152
55.9–59.8"
Finished Raglan Sweatshirt Measurements (cm / inch)
Size
Half Chest
Body Length
Shoulder
Sleeve
XS
58 / 22.8
70 / 27.6
53 / 20.9
59 / 23.2
S
63 / 24.8
72.5 / 28.5
55 / 21.7
60 / 23.6
M
68 / 26.8
75 / 29.5
57 / 22.4
61 / 24.0
L
73 / 28.7
77.5 / 30.5
59 / 23.2
62 / 24.4
XL
78 / 30.7
80 / 31.5
61 / 24.0
63 / 24.8
2XL
83 / 32.7
82.5 / 32.5
63 / 24.8
64 / 25.2
Measurements are taken with the garment laid flat and relaxed.
Half Chest: Measured straight across the chest, 2.5 cm below the underarm.
Body Length: From the high shoulder point to the finished bottom edge, including the 7 cm hem rib.
Shoulder Width: Across the back between the shoulder and sleeve seam intersections.
Sleeve Length: From the shoulder seam to the finished cuff edge, including the 7 cm cuff rib.
For the most reliable fit, compare these measurements with a hoodie you already enjoy wearing.
If you prefer the intended structured, roomy silhouette, choose the size that best matches your body chest measurement.
For more information, see our Size & Fit Guide for more information.
Our 420 GSM heavyweight full-zip hoodies are available in two series: MX Signature and BX Armor.
Both share the same organic cotton French terry foundation, Architectural Boxy Fit, unbrushed loopback interior, adjustable double-layer hood, silver front zipper and two separate patch pockets.
The difference lies in how the outer fabric looks and feels.
Series
Fit
Defining Surface
MX Signature
Architectural Boxy
Softly peached, matte exterior
BX Armor
Architectural Boxy
Clean, unbrushed exterior
MX Signature - The Tactile Expression
Our Triple Carbon Peach finish softens the outer face of the French terry, creating a smoother hand feel and refined matte appearance.
The unbrushed cotton loops on the inside retain their natural knitted character.
BX Armor - The Structured Expression
BX Armor keeps the outer face unbrushed, allowing the dense knit surface to define the fabric's appearance.
It shares the same substantial 420 GSM foundation and boxy silhouette as MX Signature.
SIGNAL: High-contrast black and white designs with contrasting tiger-head embroidery.
VOID: A quieter, tonal interpretation with black-on-black or white-on-white embroidery.
STRATA: Washed, earth-inspired colors with subtle surface variation and contrasting embroidery.
The choice between MX Signature and BX Armor comes down to how you want the fabric to look and feel.
The fit remains the same.
Fabric Composition
Main fabric: 100% Organic Cotton French Terry
Hood lining: Organic Cotton Single Jersey
Rib trims: 95% Organic Cotton / 5% Elastane
Main fabric weight: 420 GSM, excluding decoration and other garment components.
Garment Care
Machine wash cold, following the temperature and washing instructions on the garment care label.
Close the zipper and turn the hoodie inside out before washing.
Wash with similar colors. Wash dark colors separately.
Do not bleach.
Avoid tumble drying.
Gently reshape and line dry in the shade.
If ironing is permitted, use low heat on the reverse side and avoid direct contact with embroidery or zipper hardware.
Gentle care helps preserve the washed color, natural cotton surface and intended shape of the hoodie.
Always follow the care instructions attached to the individual garment.
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
