SIGNAL BX Armor - 420 GSM Heavyweight Crewneck Sweatshirt

The main body is made from organic cotton French terry. Rib trims use a separate cotton/elastane blend for fit and recovery.

• 420 GSM French Terry - Substantial by Nature

This sweatshirt begins with our 420 GSM organic cotton French terry, developed with a smooth outer surface and unbrushed cotton loops on the inside.

Unlike a brushed fleece sweatshirt, the reverse retains its knitted loopback character. The result is a substantial fabric with a distinct feel and appearance, designed for standalone wear and easy layering.

• BX Armor - Natural Unbrushed Finish

BX Armor keeps the natural outer surface of our 420 GSM organic cotton French terry, without the additional Triple Carbon Peach treatment used on MX Signature.

The unbrushed face offers a clean, understated look, allowing the fabric's natural knit character to remain visible. Its substantial weight works with the relaxed Architectural Boxy Fit to create an easy-to-wear sweatshirt with a distinct shape.

An unbrushed loopback interior and ribbed finishing at the neckline, cuffs and hem complete the design.

• SIGNAL - Contrast by Design

SIGNAL introduces a bold contrast to the BX Armor crewneck through our signature raised 3D tiger-head embroidery.

The Black version features white embroidery against a deep black cotton body, while the White version pairs black embroidery with a clean white background.

Both colorways share the same 420 GSM French terry, unbrushed finish and Architectural Boxy Fit.

The result is a clean everyday sweatshirt with a recognizable visual identity, without relying on oversized graphics.

• Architectural Boxy Fit - Room to Move

The sweatshirt has a wide, balanced body, relaxed shoulders and full-length set-in sleeves, designed around its own heavyweight sweatshirt pattern.

A 2×2 ribbed neckline, 7 cm ribbed cuffs and a 7 cm bottom hem finish the shape without sharply tightening the wrists or waist.

It is intentionally roomy, but not cropped or excessively oversized.

Our 420 GSM French terry is developed around defined quality standards for weight, wash performance, surface appearance and colorfastness.

Quality Beyond Fabric Weight

Fabric weight is only one part of a well-made sweatshirt. We also consider how the material responds to washing, how its surface holds up to wear, and how the finished garment maintains its intended shape.

These figures are the defined performance and acceptance standards for the French terry program, not individual measured results for every finished colorway.

For more on our approach to material quality, explore The Tactile Paradox.

• Architectural Boxy Fit

The REALLY COOL® MX Signature and BX Armor crewneck sweatshirts share the same dedicated Architectural Boxy pattern, developed for the weight and shape of our 420 GSM French terry.

Both feature a generous chest, controlled dropped shoulders, full-length set-in sleeves and a ribbed hem that finishes the body without excessive tapering.

The fit is intentionally roomy and substantial, but not cropped or excessively oversized.

• 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. Compare the measurements below with a sweatshirt you already own.

Unisex Size Guide - Recommended Body Chest

Finished Sweatshirt Measurements (cm / inch)

Measurements are taken with the garment laid flat and relaxed.

• Half Chest: Measured straight across the chest.

• Body Length: From the high shoulder point to the finished bottom hem, including the 7 cm rib.

• Shoulder Width: Across the back between shoulder seam intersections.

• Sleeve Length: From the shoulder seam to the end of the cuff, including the 7 cm rib.

For the most reliable fit, compare these measurements with a crewneck sweatshirt you already enjoy wearing.

See our Size & Fit Guide for more information.

Our 420 GSM heavyweight crewneck sweatshirts are developed in two series: MX Signature and BX Armor.

Both share the same organic cotton French terry foundation, Architectural Boxy pattern, unbrushed loopback interior and ribbed construction.

• MX Signature - The Tactile Expression

A controlled Triple Carbon Peach finish softens the outer face, giving the substantial cotton a more refined touch.

• BX Armor - The Structured Expression

An unbrushed exterior retains the direct character of the knitted face, with the same heavyweight foundation and boxy fit.

Both series are developed across SIGNAL, VOID and STRATA.

SIGNAL uses contrast embroidery. VOID keeps the branding tonal. STRATA introduces washed earth-inspired colors.

The choice between MX and BX comes down to how you want the sweatshirt to look and feel. The fit remains the same.

Fabric Composition

• Main fabric: 100% Organic Cotton French Terry

• Rib trims: 95% Organic Cotton / 5% Elastane

• Fabric weight: 420 GSM

• Exclusive of decoration

Garment Care

• Machine wash cold, maximum 30°C, subject to the garment care label.

• Turn the sweatshirt inside out before washing.

• Wash with similar colors; wash dark colors separately.

• Do not bleach.

• Avoid tumble drying.

• Reshape gently and line dry in the shade.

• If ironing is permitted, use low heat on the reverse side and avoid direct contact with embroidery.

Gentle care helps preserve the washed color, natural cotton surface, and intended shape of the sweatshirt. 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