Most uniform manufacturing guides focus on woven fabric — shirts, trousers, coveralls — but a large share of corporate uniform orders are knitwear: t-shirts, polos, and sweatshirts. A knitwear manufacturer works with a genuinely different fabric behaviour than a woven-fabric factory, and buyers sourcing bulk knit uniforms should understand these differences before they place an order. This guide explains the main knit fabric types used in uniform manufacturing — single jersey, pique knit, and interlock — how knit manufacturing differs from woven, and what to check when sourcing knitwear uniforms at scale, based on 30 years of running both knit and woven lines from our Ahmedabad facility.
1. What Makes Knitwear Different From Woven Fabric
Woven fabric is made by interlacing two sets of yarn at right angles — it doesn't stretch much and holds a crisp, structured shape, which is why it's used for formal shirts and trousers. Knit fabric is made by looping a single yarn continuously, which gives it natural stretch and a softer drape, but also means it behaves differently under a cutting blade and a sewing needle. A knitwear manufacturer has to account for stretch recovery, edge curling during cutting, and seam behaviour that a woven-fabric cutter never deals with. This is the foundational difference buyers should understand before assuming a factory that's excellent at woven uniforms is automatically equipped for knit garment manufacturing — the machinery, needles, and cutting process are genuinely different.
This difference also shows up in how a knit garment factory measures and grades its fabric before cutting. Woven fabric is typically measured and cut by width alone, since it holds its dimensions reliably off the roll. Knit fabric, by contrast, needs to be relaxed and rested for a period before cutting — freshly knitted fabric under tension on the roll will shrink slightly once it's allowed to relax, and cutting it too soon after arrival produces garments that shrink further after the first wash than expected. A knitwear manufacturer with a proper fabric-relaxation process built into the production schedule avoids this entirely; a factory unfamiliar with knit fabric sometimes skips this step and ends up delivering a batch that fits differently after the customer's first wash than it did on delivery.
2. Single Jersey: The Fabric Behind Every Basic T-Shirt
Single jersey is the most common knitted t-shirt fabric — a plain, single-layer knit with a smooth face and a slightly textured back, the same construction found in almost every basic cotton t-shirt. It's lightweight, breathable, and cost-efficient, which makes it the default choice for high-volume uniform t-shirt orders like event merchandise, factory floor tees, or casual-Friday company wear. The trade-off is that single jersey curls at the raw edge more than other knits and has less structure, so it needs careful hemming and stitching to avoid a wavy, unfinished-looking edge on collars and sleeves — a detail that separates a well-made uniform t-shirt from a cheaply cut one.
Single jersey also comes in a range of yarn compositions relevant to uniform buyers — 100% cotton, cotton-polyester blends, and all-polyester options each behave differently under bulk industrial washing. A 100% cotton single jersey feels the most breathable and natural against skin, which matters for uniforms worn through long shifts, but it also shrinks more over repeated washes unless pre-shrunk fabric is used. A cotton-polyester blend (commonly 65/35 or 80/20) holds its shape and colour better across dozens of wash cycles at the cost of slightly less breathability — a trade-off worth discussing explicitly with a manufacturer rather than assuming "cotton t-shirt" means the same thing across every supplier.
3. Pique Knit: Why Every Polo Shirt Uses It
Pique knit is the textured, slightly waffle-like fabric used almost universally for polo shirts — including corporate polo shirts and branded team wear. Compared to single jersey, pique knit has more structure and body, which is exactly why it holds a collar shape and drapes better on a broader range of body types. It's also the preferred fabric for embroidered logos, since its firmer surface supports stitching without puckering as easily as very lightweight single jersey. Most uniform polo orders sit in the 180–220 GSM range for pique knit — heavy enough to look substantial, light enough for all-day office or floor wear.
Pique knit's structure also makes it more forgiving of body shape variation across a large team than single jersey — the fabric's inherent texture and slightly stiffer hand hide minor fit inconsistencies that would show up as visible pulling or clinging on a smoother, lighter single jersey t-shirt. This is part of why polo shirts remain the default choice for customer-facing uniform roles across a wide range of body types and ages within one team, while single jersey t-shirts are more often reserved for internal or casual-wear contexts where a closer, more form-fitting look is acceptable or even preferred.
4. Interlock: The Fabric Choice for Sweatshirts and Heavier Layers
Interlock knit is a denser, double-layer construction — essentially two single jersey layers knitted together — which gives it a smoother, thicker feel with almost no edge curl. This makes interlock (and its close cousin, fleece-backed knit) the standard fabric for sweatshirts and heavier layered uniform pieces, where more structure and warmth are needed than a t-shirt fabric can provide. A sweatshirt manufacturer working with interlock or fleece has to manage a heavier fabric through the cutting and stitching process, and typically uses different sewing machine settings (needle size, stitch tension) than a lightweight single jersey t-shirt run — another reason knit uniform fabric sourcing benefits from a manufacturer experienced specifically across weight ranges, not just one garment type.
Sweatshirt construction also usually involves ribbed cuffs, hem, and collar bands — a different knit structure again from the main body fabric, chosen specifically for its elasticity so the cuffs and hem grip snugly without losing shape after repeated stretching on and off. Matching these rib components to the main interlock or fleece body fabric, both in colour and in shrinkage behaviour, is a detail that separates a well-constructed uniform sweatshirt from one that develops loose, sagging cuffs after a few months of daily wear. A manufacturer sourcing rib fabric from the same mill and dye lot as the body fabric avoids this mismatch far more reliably than one sourcing components from separate, uncoordinated suppliers.
5. Cutting and Stitching Knit Fabric at Scale
Cutting knit fabric for a bulk uniform order requires more care than woven fabric because knit stretches and can distort under the cutting blade if it isn't laid and tensioned correctly before cutting — a misaligned cut shows up as a garment that twists slightly after the first wash. Stitching also differs: knit seams typically use specialised stitches (like a flatlock or coverstitch) that stretch with the fabric instead of popping under tension, which is different from the straight-lock stitching used on most woven uniform seams. A knit garment factory running these processes daily, with dedicated knit-line machines rather than repurposed woven-line equipment, produces a noticeably more consistent finish across a large batch — worth confirming when evaluating a manufacturer for a bulk knitwear uniform order.
Marker planning — how pattern pieces are laid out across a roll of fabric before cutting — is another area where knit and woven diverge. Knit fabric often has a slight lean or bias in its loop structure that needs to be accounted for when laying pattern pieces, or the finished garment can twist slightly to one side after washing, a defect commonly called torque or spirality. Skilled knit-line cutters are trained specifically to recognise and correct for this during marker layout, whereas a cutter trained only on woven fabric may not know to look for it at all. This is a subtle defect that often only becomes visible after the customer has washed the garment a few times, making it one of the more expensive mistakes to discover late in a bulk order.
6. What to Ask a Knitwear Manufacturer Before Placing a Bulk Order
Buyers sourcing bulk t-shirts, polos, or sweatshirts should ask specifically which knit fabric the manufacturer proposes for the garment (single jersey, pique, or interlock) and why, rather than accepting a generic "cotton fabric" answer — the fabric type materially affects durability, print/embroidery quality, and how the garment fits after repeated washing. It's also worth asking about pre-shrinking (knit fabric shrinks more than woven if not treated before cutting) and about the manufacturer's in-house quality checks specific to knit seams, since stretch-related seam failures are the most common complaint with poorly made knitwear uniforms. A 3-checkpoint quality control process that checks fabric before cutting, stitching before packing, and a final inspection catches these issues before a full batch ships.
It's also reasonable to ask for a washed sample, not just an unwashed one, before committing to a full bulk knitwear order. Many knit fabric issues — shrinkage beyond spec, colour bleeding, seam puckering, torque or spirality — only show up clearly after at least one wash cycle, so an unwashed sample can look perfectly fine while hiding a defect that surfaces once the customer's team actually starts wearing and laundering the garments. A manufacturer confident in their knit fabric sourcing and construction process should have no objection to sending a pre-washed sample alongside the standard unwashed one.
Getting the Most From Knitwear Uniform Manufacturing
Knitwear uniforms — t-shirts, polos, and sweatshirts — deserve the same manufacturing scrutiny as formal woven uniforms, not less. Match the fabric to the garment (single jersey for t-shirts, pique for polos, interlock or fleece for sweatshirts), confirm the manufacturer runs dedicated knit-line cutting and stitching rather than adapting woven-line equipment, and lock GSM and pre-shrink specifications for repeat orders so a batch ordered next year matches this year's exactly. For the broader manufacturing process across both knit and woven uniform categories, our custom manufacturing process guide covers the end-to-end production flow.
Buyers reordering knitwear uniforms year after year should also treat the original approved sample as a permanent reference, not a one-time formality. Keeping a labelled, unwashed swatch of the exact approved fabric, alongside the washed test sample, gives both the buyer and the manufacturer a physical benchmark to compare future batches against — colour, GSM, and hand-feel can all drift slightly over time even from the same mill, and a physical reference catches this drift before an entire reorder ships in a subtly different fabric than the original.
Frequently Asked Questions
What is the difference between single jersey and pique knit fabric?
Single jersey is a plain, smooth, lightweight knit typically used for basic t-shirts, while pique knit has a textured, waffle-like surface with more structure, making it the standard fabric for polo shirts. Pique holds embroidery and collar shape better; single jersey is lighter and more cost-efficient for high-volume t-shirt orders.
Why does knit fabric need a different manufacturing process than woven fabric?
Knit fabric stretches and can distort during cutting if not tensioned correctly, and its seams need stretch-accommodating stitches like flatlock or coverstitch instead of the straight-lock stitching used on woven fabric. A knitwear manufacturer runs dedicated machines and cutting processes suited to this stretch behaviour, which a woven-only factory typically isn't equipped for.
What GSM is best for uniform t-shirts and polos?
Uniform t-shirts in single jersey commonly range from 150–180 GSM, while polo shirts in pique knit typically sit in the 180–220 GSM range for a good balance of structure and comfort. Heavier interlock or fleece for sweatshirts usually runs higher, often 240 GSM and above depending on the intended warmth.
Can a single manufacturer produce t-shirts, polos, and sweatshirts consistently across reorders?
Yes, provided the manufacturer documents fabric type, GSM, and colour specifications per product and holds them on file for future batches. A manufacturer with ISO 9001:2015 certified processes and a track record across knit and woven garment types can maintain that consistency across multi-year reorders more reliably than switching vendors each cycle.
Aura Workwear manufactures knitwear uniforms — t-shirts, polos, and sweatshirts — alongside full woven uniform ranges for businesses across India, from our Ahmedabad facility. Explore staff uniforms, or read our custom manufacturing process and our t-shirt GSM guide.
