What Are Scrubs Made Of? Fabric Blends and What They Mean on Shift

Flip the care label on any scrub top and you'll find a percentage list that reads like a chemistry quiz. Those numbers decide how the top feels at hour ten, whether the knees bag by lunch, and how many hot washes it survives.

We build our scrubs around three different blends, so we spend a lot of time staring at these labels. This guide shows you how to read one, from people who've worn the results through 12-hour shifts.

What Scrubs Are Made Of

Scrubs are made of polyester, cotton, rayon and spandex, almost always blended together. Most retail scrubs are now polyester-led, with a few percent of spandex for stretch and sometimes rayon for softness. Single-fibre scrubs are now the exception.

Blending happened because no single fibre delivers durability, breathability and stretch at once. Scrubs also get laundered far harder than normal clothing, often hot and often daily, and every fibre pays a different price for that.

Fibre is what the yarn is made of. Construction is how that yarn becomes cloth: woven poplins and twills read crisp and structured, while knits give mechanical stretch before any spandex joins. Finish is anything applied afterwards, like a fluid-repellent coating. Most guides collapse all three into the word "fabric", and that's where label confusion starts.

A concrete example: our VetCore™ cargo scrub pants are 92% recycled polyester and 8% spandex, which is fibre. The GENU™ removable knee protection that sits in internal pouches is construction. The two are chosen separately, and they fail separately.

The Four Fibres in Almost Every Scrub

Care labels list fibres by percentage, highest first, and that order tells you what the maker prioritised. A tag leading with polyester was built to survive washing, while one leading with cotton was built for softness and price.

Polyester

Polyester does the structural work: strength, colour retention through repeated hot washes, wrinkle resistance and fast drying. It's hydrophobic, so it repels moisture rather than absorbing it, which is why polyester scrubs dry overnight on a rack.

The trade-offs are real. On its own, polyester breathes poorly, holds onto odour, and can feel plasticky at low quality. It dominates the percentage anyway because it's what stops a scrub top going baggy or pilling by month three.

Cotton

Cotton is the only natural fibre in the usual lineup and the one most people assume scrubs are made from. It's soft against the skin, gentle on sensitive skin, and highly air permeable, which is why it still owns the comfort reputation.

Its decline in scrubs comes down to how it behaves under stress. Cotton shrinks, dries slowly, fades with hot washing, absorbs fluid rather than repelling it, and loses shape. On shift, an absorbent top means sweat and spills stay with you.

Do 100% cotton scrubs exist? Yes, mostly in budget ranges and some facility-issued theatre sets, where cheap replacement and hot commercial laundering matter more than stretch. Those hospital theatre sets are also where the green and blue tradition lives; we've covered what scrub colours mean separately.

Cotton still wins outright where durability demands drop and softness matters most. It's why our scrub caps are 100% cotton, while our scrub tops aren't. A cap is worn light and washed gently, where a top gets stretched, scrubbed and laundered hard. The best fibre is garment-specific.

Rayon (Viscose, Modal, Lyocell)

First, the naming. Rayon is a family of semi-synthetic fibres made from processed cellulose, usually wood pulp, and viscose, modal and lyocell are all members of it. On Australian labels you'll usually see "viscose", the most common type of rayon.

Rayon brings drape, a cool silky hand, and better moisture handling than polyester manages alone. That's the softness you feel in a good retail scrub.

The cost: rayon weakens when wet, contributes to shrinkage, and needs polyester around it to carry the structure. You'll never see rayon leading the percentage on a scrub built to last.

Spandex (Elastane, Lycra)

Spandex, elastane and Lycra are three names for one fibre. It appears in small percentages with a disproportionate effect: 2 to 3% gives light give, while 5 to 8% gives full athletic stretch.

Spandex is also the most care-sensitive fibre in the blend. High heat and chlorine bleach break it down, which is why stretch scrubs washed hot or dried on high go slack early. Stretch and recovery are two different specs, covered below.

How the Common Blends Perform

The blend is what you're really choosing, and this is how the common ones compare.

Poly-Cotton (65/35 and 55/45)

This is the traditional institutional blend, and you'll still find it in many facility-issued scrubs. The reasons are bulk cost and laundry survivability: it washes hot, tolerates industrial laundering, and costs little to replace. Staff comfort ranks further down that list.

On the body it feels heavier and stiffer than retail blends, with minimal stretch unless spandex joins the mix. If your workplace launders your uniform for you, this blend is probably why it feels the way it does.

Poly-Rayon-Spandex (Around 74/20/6)

This three-fibre blend is now the default for retail scrub brands, and each percentage has a job. Polyester at 74% carries durability and shape. Rayon at 20% supplies the soft hand and drape. Spandex at 6% delivers the 4-way stretch.

It's the blend behind our solid Classics scrubs: 74% polyester, 20% rayon and 6% spandex. Strengths are the soft feel, quick drying, and shape retention through home washing. The trade-offs are a higher price than poly-cotton, and spandex that ages if you launder it hot.

Recycled Polyester Blends

Recycled polyester, or rPET, is waste plastic reprocessed into polyester yarn. The fabric in our printed tops starts as used plastic bottles, around 13 bottles' worth per top.

Certification separates a real claim from marketing. GRS, the Global Recycle Standard, verifies recycled content and chain of custody. An "eco" claim with no certification named tells you nothing.

Our printed scrub tops and Planet Friendly range run 92% GRS-certified recycled polyester with 8% spandex. Notice the ratio shift when rayon drops out: a higher spandex share gives more stretch and recovery, with less of rayon's silky drape.

We've made the sustainability case for scrubs made from recycled materials separately. Here the point is narrower: the recycled label changes where the fibre comes from. The blend and the knit decide how it behaves on shift.

Performance Knits and Added Finishes

Some brands add nylon for tear strength, or apply treatments on top of a standard blend: DWR fluid repellents, odour-control and antimicrobial finishes.

These are treatments rather than fibres, and they wear off. The label rarely discloses the rate, though better brands rate finishes to a wash count. If a spec sheet leans on finishes rather than fibres, ask what's left at wash fifty.

Why the Percentages Sit Where They Do

A scrub fabric has to satisfy four demands at once: survive frequent or commercial hot laundering, resist fluid, allow a full range of motion, and still look professional after a shift of bending and lifting.

Each of those demands shows up in the numbers. Laundry durability pushes the polyester share up, comfort pulls rayon in, movement adds the spandex, and cost caps all three.

Scrubs are one of the few garments designed around the laundry cycle first and the wearer second.

What the Fabric Spec Changes on Shift

This is what each spec line means in practice on your shift.

1) Breathability vs Moisture-Wicking

These get used interchangeably and they do different jobs. Breathability moves air through the fabric. Wicking moves liquid sweat along the fibre and out to evaporate.

A fabric can wick well and still trap heat. That's the usual story when someone says a scrub "doesn't breathe": the sweat is handled, the warm air isn't. If you run hot, check weight and knit openness, and think about what you wear under scrubs, since a wicking underscrub changes how the whole top feels. Our Eco-Soft Collection underscrubs are made from 78% recycled materials.

2) Stretch Direction and Stretch Recovery

2-way fabric gives on one axis, while 4-way gives on both. You feel the difference reaching overhead for a fluid bag or squatting to a bottom drawer. We've explained what 4-way stretch scrubs are in full elsewhere.

Recovery is the spec nobody prints. It's how completely the fabric snaps back after stretching, and it's the real cause of knees and seats bagging out by mid-shift. Recovery depends on spandex quality and construction. Kneel on a clinic floor with a blocked cat for twenty minutes and you'll learn your pants' recovery grade fast.

3) Weight, Opacity and Colour

Most listings skip GSM, grams per square metre, but weight can change how a scrub feels as much as the fibre list does. Two identical blends at different weights behave nothing alike. Lighter fabric drapes and cools but shows more underneath, while heavier fabric is opaque and structured but warmer.

Opacity is the check before buying light colours. Weight and knit density decide it more than fibre does, so hold a pale top up to the light before trusting it under fluorescents.

4) Fluid Claims and Finish Claims

Fluid-repellent, fluid-resistant and barrier-rated are three different claims. Everyday repellency means a splash beads up long enough to wipe off. Barrier protection belongs to surgical gowns and drapes supplied as medical devices, and scrubs aren't PPE, so wear the gown when the procedure calls for it.

Some brands add antimicrobial or odour-control finishes. These target odour in the fabric itself, they aren't infection control, and they wear off with washing. If a brand makes the claim, look for the wash count it's rated to, and treat it as a freshness feature.

Pilling, snagging and colour-fastness decide whether a top still looks professional after a year. High-polyester knits hold colour better than cotton-heavy blends, which fade first, but low-quality polyester can pill. Washing inside-out helps both. Check reviews for wash-count comments before you trust a print.

Reading a Scrub Label Before You Buy

Run the checks in this order:

1. Fibre percentages, highest first, to see what was prioritised

2. Fabric weight or GSM, if published

3. Stretch direction: 2-way or 4-way

4. Any applied finishes, and the wash count they're rated to

5. Care instructions, matched against how you'll wash them

Walk away when you see these red flags:

• Stretch claimed with no spandex or elastane listed on the label

• Fibre content undisclosed anywhere on the listing

• "Eco" with no certification named

• "Antimicrobial" with no wash-count figure

• Care instructions that don't match how you'll actually wash them

Then match the fabric to your context, because the best fabric for scrubs depends on where you work. In a busy vet clinic, on a hot ward or in outdoor work, weight and breathability come first. In surgery, dentals and other high-fluid rooms, repellency and opacity. If your employer launders your uniform, durability beats softness.

It's why our VetCore™ Vet Med scrubs lead with recovery. Our Vet Med Scrub Tops are designed and tested by veterinary professionals to meet the unique demands of a career in vet med. If you're a vet nurse hoisting a Labrador onto the consult table several times an hour, that's a recovery test.

One caveat: fit changes how a fabric performs. A well-drafted garment in a mediocre fabric often outperforms the reverse, so read our guide on how scrubs should fit before blaming the blend.

How Fabric Choice Changes Care and Lifespan

Heat is the main enemy of spandex and of most applied finishes. Wash temperature is the single care decision that most affects how long a fabric performs, whatever the blend.

High-polyester blends hold colour and shape through frequent washing because the fibre neither absorbs much water nor shrinks. Cotton-heavy blends fade and shrink for the opposite reason. Polyester's one care quirk is odour retention: it holds body oils that bacteria feed on, so it needs a proper wash, never a quick refresh cycle.

Method and frequency live in our full guide to washing scrubs for longevity. The short version: wash cold, turn scrubs inside-out, tumble dry low, and skip fabric softener, which coats the fibres and can dull wicking.

Buying Scrubs by the Numbers

The tag tells you almost everything if you know the order to read it: fibre percentages for priorities, weight for climate, stretch direction for movement, finish claims for scepticism.

Our solid Classics run 74% polyester, 20% rayon and 6% spandex. Printed and Planet Friendly tops run 92% recycled polyester from GRS-certified yarn, with 8% spandex. VetCore™ is a separate 92/8 recycled poly and spandex fabric, built for vet work first.

If you'd rather skip the label homework, the Dr. Woof Scrub Set pairs a top and pants with the fabric already matched, and team orders with embroidery are available for whole clinics.