Cotton, polyester, blends, fleece, and performance fabrics compared for decoration

What to take away

A decorator asking which fabric is best is asking the wrong question. The answer depends on the artwork, the garment, the print method, the hand the customer wants and the wash cycle the shirt will survive.

A 4.1 oz cotton jersey printed with water-based ink and a 9 oz dark polyester fleece run through a heat transfer are two different engineering problems. Treat them that way.

Comparison at a glance

These are screening prompts, not acceptance results.

Typical starting settings, not acceptance criteria:

Method fit by category:

Method picks differ. Water-based suits a soft hand on cotton. Plastisol suits bright color on dark cotton. DTG fits short-run full-color art on cotton and pretreated polyester. Transfers cover names and numbers. Embroidery suits logos on fleece and structured knits.

Cotton jersey

Cotton absorbs water-based ink and is available in more blanks than any other fiber. That absorbency is also why yarn fuzz matters: loose fiber can rise through the ink film during cure and dull fine detail or drop opacity.

2 oz combed ring-spun tee (Bella+Canvas 3001 class) share a fiber and not a surface. 1 oz tee (Comfort Colors 1717 class) brings its own finish. Plastisol usually fuses at a 320 F film temperature for 60 to 90 seconds. Water-based ink typically cures at 300 to 320 F for 90 seconds to 3 minutes.

Cotton begins to scorch near 400 F.

Finish changes wetting and adhesion. A softener-heavy hand can leave a print that looks right on the platen and lifts after three washes.

Knitted cotton moves in length and width after heat and laundering. Measure the decorated garment, not the unprinted control. A dense print area restrains the fabric locally, so surrounding change reads as distortion.

The NIST fibers and fabrics reference separates fiber properties from the effects of blends, structure, finish, construction and care. It states that wash-and-wear performance depends on fiber types and amounts, fabric structure, finish, garment construction, and washing and drying. The document is old. Use it for those distinctions, not for current product settings.

Polyester knit

Polyester shows up in athletic shirts, fleece, linings and blends. It takes up almost no moisture and holds dimensions well.

A 3.8 oz polyester interlock (Badger B-Core 4100 class) and a brushed polyester fleece share a fiber and nothing else. Many polyester knits hold a 280 to 300 F cure window. Glazing and shrinkage risk climbs above 320 F. Low-cure plastisol and dye-blocking bases are built for that range.

Heat changes gloss, texture, shape and color. Disperse dye can move into plastisol, transfer film or adhesive when the press gets hot, especially on dark and saturated garments. A low-temperature adhesive or a dye-blocking layer lowers the risk. Neither is a universal cure.

The word polyester hides real differences. A spun-polyester jersey, a textured performance knit, a recycled filament fabric, a brushed fleece and a coated shell do not present the same surface to ink or adhesive.

Cotton-polyester blends

A blend mixes fibers inside the yarn or across the fabric. What the decoration touches is the printed face, the yarn construction, the blend ratio and the finish.

Common ratios are 50/50 (Gildan 18500 class fleece), 65/35 poly/cotton (many retail-style tees), 80/20 cotton/poly (Independent Trading Co. SS4500 class fleece) and 50/25/25 tri-blend (Next Level 6010 class).

A 50/50 heather exposes fibers differently than a solid 65/35 fleece. One component may accept a liquid while the other resists it. Cotton fibers can rise through a print while polyester dye migrates under the same heat.

Qualify opacity, color, cure, hand, shrinkage and care as one finished build. A blend that passes opacity can still fail crocking, and a blend that passes crocking can still shrink past tolerance.

Fleece and French terry

Fleece is a construction or a finish, not a fiber declaration. Sweatshirt fleece usually has a jersey-like technical face with reverse-side floats that are brushed or napped. French terry keeps visible loops instead of a napped interior. Either can be cotton, polyester or a blend.

Typical sweatshirt fleece runs 8 to 13 oz per square yard, and French terry often runs 6 to 10 oz. Champion S700 Powerblend and Gildan 18000 are 50/50 builds; a cotton-rich French terry from a retail line behaves differently at the face.

CottonWorks describes French terry as an unnapped fleece and notes that typical fleece uses reverse-side yarn floats that can be napped while the technical face stays a jersey structure. Its single and double knits overview separates common knit structures and ties construction to weight and stability. Record structure separately from fiber on every spec sheet.

Inspect these physical details on the blank you plan to decorate.

A thick hoodie may need platen adjustment or a raised print surface to isolate seams. Embroidery may need a backing that controls movement without turning the garment rigid.

Performance fabrics

Performance is a use category, not a material. It can mean moisture movement, stretch, fast drying, odor treatment or ultraviolet protection. Ask for the fiber, construction, finish, test method and care instruction behind the claim.

Sport-Tek ST350 and Badger B-Core 4100 are both polyester performance jerseys. Elastane content is often 5 to 15 percent in stretch knits, and pressing above 300 F can damage the fiber.

Stretch fabric and decoration have to move together. A nonstretch transfer restricts a highly elastic knit and cracks at the shoulder. High pressure marks the texture. Heat affects elastane and surface finishes. Pretreatment can leave a visible halo on a light, smooth fabric.

Choose through a controlled trial

One rule covers every category: qualify the exact blank, ink and settings you will run, on your own equipment, before you quote.

Run the same artwork on coded candidate blanks. Hold artwork dimensions, equipment, operator, consumables and inspection conditions constant. Change process settings only through documented trials, then compare:

Release the configuration that passes your stated product requirements. Keep the failed candidates in the file so the next buyer does not pay for the same trial twice.

Published test methods give comparable numbers: AATCC 61 for laundering colorfastness, AATCC 135 for dimensional change, AATCC 8 or 116 for crocking, and ASTM D5034 for breaking strength.

Cost per unit depends on blank tier, weight, fiber and dye method. Screen printing adds a setup charge per color, so short runs carry more cost per piece than DTG or transfers. Embroidery adds a digitizing fee plus a stitch count charge. The cheapest qualified build wins, not the cheapest blank.

Common questions

Is cotton always better for direct-to-garment printing?

No. Fiber affects wetting and how colorant interacts with the surface. But many other factors shape the result:

Is polyester always dimensionally stable?

No. Fiber properties do not guarantee garment dimensions. Knit construction, processing history, heat, seams, trims and the care cycle can still move the shape. Measure the decorated piece after wash, not the greige roll.

Does a cotton-polyester ratio predict print quality?

It describes the material and nothing more. The ratio does not tell you which fiber dominates the face, how the yarn was spun, which dye or finish is present, or how the garment answers your process.

Is fleece suitable for detailed graphics?

It can be, if the face is smooth and stable enough for the method you chose. Detail on the chosen blank depends on: