Workwear Fabric Guide: TC vs CVC, Cool Cotton and Stretch Twills

Ask a workwear buyer what went wrong with their last order and the answer is rarely the sewing. It is the fabric: trousers that shone at the knee in three months, shirts that came back from the laundry a shade lighter than the pants, a "cotton-rich" batch that stayed heavy through every humid shift. This guide explains the fabric families used across our work pants, work shirts and work jackets — TC, CVC, Cool Cotton and stretch twills — in terms of what each one does on a working body and in an industrial wash.

The two letters that run workwear: TC

TC is a polyester/cotton blend, named by its ratio. The two ratios that dominate workwear are TC 80/20 (80% polyester, 20% cotton) and TC 65/35 (65% polyester, 35% cotton). Polyester brings tensile strength, abrasion resistance, colour fastness and wrinkle recovery; cotton brings a softer, more absorbent hand. Move the ratio toward polyester and the fabric gets harder-wearing, cheaper per metre and less absorbent; move it toward cotton and the hand improves while wash shrinkage and colour need more management.

In production, TC 80/20 is the trouser fabric. At 190 GSM it covers most fleet issues; at 235 GSM it serves maintenance and outdoor crews. TC 65/35, slightly softer and more structured, is the shirt and jacket standard — our jacket platform uses it at 260 GSM with Oxford reinforcement panels at 180 GSM.

CVC: when the buyer wants cotton to lead

CVC ("chief value cotton") flips the ratio: cotton is the majority fibre, polyester the reinforcement. A CVC work shirt feels closer to a retail shirt, which is why hospitality-adjacent and customer-facing programs ask for it. The honest trade-offs: CVC typically costs more than the equivalent TC, and the selection rule is the wash regime — programs washed hard, hot and often are usually specified in polyester-rich TC, while CVC is chosen where the wash is gentler and the cotton hand is the point. Where crews are office-adjacent and image outranks abuse, CVC is the right call. Where garments are washed hard and often, it is usually a false economy — a point we make to buyers even though TC is the volume fabric across this range.

Cool Cotton: polyester that behaves politely

Cool Cotton is a cotton-touch polyester-rich construction (the multi-pocket trousers in our cargo work pants range use an 80/20 Cool Cotton) built for hot climates. It presents a matte, cotton-like surface, so it reads as a uniform fabric rather than sportswear. In genuinely hot, humid work it is the pragmatic middle path: a cotton-touch option specified where heat, rather than the wash regime, is the dominant condition.

Stretch twill: the 2% that changes the garment

Our stretch trouser fabric is 65% polyester / 33% cotton / 2% elastane at 250 GSM. Two percent elastane sounds trivial; on a ladder, in a van, kneeling at a machine, it is the difference between a trouser that permits the job and one that argues with it. Stretch costs more per metre and needs disciplined cutting and sewing (elastane fabrics relax if handled badly), which is why it is offered as a deliberate program upgrade rather than the default. The garment-level results are covered in cargo work pants features.

The heavy end: Kingsmill cotton at 350 GSM

Some markets still ask for all-cotton workwear, and our Kingsmill trouser is 100% cotton at 350 GSM — a heavy, traditional hand with the known cotton caveats: shrinkage management and colour care in the wash. Offered because the demand is real, specified with eyes open.

GSM: the number to argue about

GSM (grams per square metre) is the single most useful specification a buyer can hold a factory to, because it is measurable on arrival. The ladder across this site: shirts 100–200, trousers 190–250, jackets 260, Kingsmill cotton 350. A quote that does not state GSM per garment is not yet a quote — it is a photograph with a price. Our work uniform program cost guide shows how GSM moves unit cost.

A working selection method

1. 1. Start from the wash. Industrial laundry at high frequency pushes you toward polyester-rich TC regardless of hand preference.
2. 2. Then the climate. Heat and humidity argue for Cool Cotton or lighter GSM; cold argues for weight and layering (see summer vs winter workwear).
3. 3. Then the job's abrasion map. Knees, thighs, straps and seats decide whether 190 GSM suffices or 235/250 GSM is insurance.
4. 4. Then image. Customer-facing programs may justify CVC shirts — paired with TC trousers, never the reverse; nobody sees the trouser's hand feel.

Every fabric named here is in production across the categories on this site, specified on the custom workwear page and produced by the group profiled at workwear manufacturer. Send your current fabric spec — or just describe the job — and we will recommend a construction and weight with the quote.

Wash behaviour: where fabric choices are audited

Specifications are written at order time but audited by the laundry. Polyester-rich TC is the construction fleet programs standardise on for high-temperature, high-frequency washing; its weakness shows as surface shine on dark trousers at friction points over long service — mitigated by the heavier 235 GSM grade and by honest expectations, not eliminated. CVC's cotton face belongs to gentler wash regimes and image-led programs, where garments are replaced on image rather than wear. Stretch twill adds a specific requirement: elastane degrades under chlorine-heavy regimes, so bleach-based laundry contracts should be declared at specification, not discovered at claim time. Declaring the laundry regime is part of the fabric conversation — a program washed on site, a program sent to an industrial laundry, and a program washed at home are three different specifications wearing the same name.

Specification mistakes we see repeatedly

• Copying a retail garment's composition into a workwear spec: retail cloth is chosen for the shelf, not the wash.
• Specifying GSM without tolerance: a serious quotation states the weight and holds it as a measurable acceptance point on arrival.
• One fabric for every garment: shirts, trousers and jackets have different wear maps; the ladder exists because a single choice over-builds the shirt and under-builds the trouser.
• Judging hand feel dry, in an office: wet behaviour and post-wash hand are the working reality; wash the sample swatch five times before the hand-feel verdict.

The short answer

If you remember one line: TC 80/20 for trousers, TC 65/35 for shirts and jackets, CVC only where image beats abrasion, Cool Cotton where heat beats both, stretch where the job is done kneeling. Everything else in this guide is the reasoning — and the reasoning is what lets you adapt the line to your own crews instead of borrowing someone else's uniform.

How to verify a fabric claim on arrival

Close the loop: fabric claims are testable. Weigh a cut square of known area against the specified weight — a whole garment cannot verify GSM, because trims, seams, pockets and mixed fabrics distort the figure — and check composition by burn behaviour only as a rough tell (formal verification is a lab test, which buyers at program scale sometimes commission on first delivery), and wash a garment five cycles against the colour standard before the bulk is released from the inspection point. Our outgoing standard (AQL 2.5 / 4.0, with SGS, ITS or buyer-nominated inspection accepted — see workwear manufacturer) exists so that these checks have a contractual home. A fabric guide earns its keep when the program's acceptance sheet simply copies its numbers.