There's no single "best" stretch fabric
If you're hunting for the one stretch fabric spec that beats all the others, I'll save you the trouble. It doesn't exist. The right pick depends on what you're making, how hard it gets used, and whether you need custom prints.
I'm the office administrator for a 90-person custom apparel company. I manage all our fabric and trim ordering—roughly $180,000 a year across about 10 vendors—and I report to both operations and finance. When I took over purchasing in 2021, I assumed "better" meant a higher spandex number and a fancier fiber name on the spec sheet. That assumption cost me a printed spandex run nobody wanted to sell. About $4,000—well, closer to $4,300 once you add the freight we ate.
So here's how I break it down now. Three situations, three different answers.
- Performance wear that gets worked hard (gym, compression, team gear)
- Anything needing custom prints, specific colors, or your logo
- Soft comfort basics where budget matters
Find your situation. Skip the rest—or read on if you're not sure which one you're in. Most people aren't.
Scenario 1: Performance wear that gets worked hard
If the fabric is going to be sweated in, washed weekly, and stretched hard, don't get creative. Go with 85 polyamide 15 elastane fabric or 85 nylon 15 spandex.
Those two are the same thing, by the way.
People assume polyamide and nylon are two different fabrics and pay a premium for whichever name sounds more technical. They're not. "Nylon" is the trade name; "polyamide" is the chemistry name. Same polymer. I've watched buyers pay 8–12% more for "nylon" on a spec sheet that described the exact same supply—same hand feel, same consistency, higher price. Don't do that.
What 85/15 buys you is durability. The nylon side holds up to abrasion and keeps its shape after washing; the 15% elastane (spandex) gives it the stretch and recovery. That's the ratio you see in decent compression gear and performance jersey 4 way stretch fabric.
Now, here's the part most buyers miss. Everyone fixates on the 85/15 vs 86/14 number. The number barely matters. What predicts how a fabric actually wears is the knit structure and the weight. A jersey 4-way stretch at 240 GSM behaves nothing like one at 180 GSM, even with identical fiber percentages. Jersey knit is your basic single-knit structure—light, stretchy, breathable. Interlock and double-knit are heavier and more opaque. If your supplier only quotes you a fiber percentage and says nothing about structure or weight, you're not comparing fabrics. You're comparing labels.
For high-use performance wear, I ask for three things: fiber content, GSM, and the stretch direction (4-way vs 2-way). If a quote doesn't have all three, I don't send it to my boss.
Scenario 2: You need custom prints or your logo
This is where the "better fabric" instinct bites people. If you need all-over prints, patterns, or vivid brand colors, the honest answer is that 86 polyester 14 spandex—the "cheaper" option—is often the correct pick, not the compromise.
Here's why. Most all-over printing on spandex is done by dye sublimation, which bonds the ink into polyester fibers at high heat. It doesn't behave the same way on nylon. So if you want a custom printed spandex fabric with a pattern that won't wash out, you need a polyester base. Choosing 85/15 nylon for a print job is a classic mistake—you pay more for a fabric that takes the print worse.
The specs that actually matter for printed spandex are different from performance spandex:
- Print method. Sublimation for polyester; digital or screen printing for other bases. Ask which one your supplier uses before you approve a sample.
- Color accuracy. Industry standard color tolerance is Delta E under 2 for brand-critical colors. A Delta E of 2–4 is noticeable to a trained eye; above 4, most people can see it. Reference: Pantone Color Matching System guidelines.
- Resolution. For digital textile printing, treat 300 DPI as the floor for anything with fine detail—at final size, not on the file. That's the same commercial print standard used across the industry.
And one thing that applies to every performance claim you print on a hangtag: per FTC guidance (ftc.gov), claims like "moisture-wicking" or "compression" have to be truthful and substantiated. If you can't back it up, don't put it on the label.
Here's a mistake I made so you don't have to. We didn't have a formal approval step for print specs. Ordered a run of custom printed spandex, approved it off a phone photo, and the actual colors landed two shades off our brand. Cost us the run—about $3,800—because there was no signed-off color standard to point to. The third time something like that nearly happened, I built a one-page sign-off sheet: Pantone reference, print method, base fabric, GSM. Switching to that sheet cut our approval turnaround from about a week to two days and killed the back-and-forth email chains. Nobody has sent me a wrong-colored run since.
Scenario 3: Soft comfort basics, budget matters
If you're making loungewear, basic yoga pants, or comfort pieces where the priority is softness and price—and performance is secondary—this is a different decision entirely.
For yoga pants soft fabric, the softness you feel doesn't come from the fiber percentage on the label. It comes from the knit, the yarn denier, and the finish. A peached or brushed 86 polyester 14 spandex can be genuinely buttery. A poorly finished 85/15 nylon can feel slick and cheap. Same price tier, wildly different result.
So in this scenario, I don't chase the premium spec. I chase the finish. I ask suppliers for a swatch I can actually feel, and I wash it twice before deciding—because "soft out of the bag" and "soft after five washes" are two different fabrics.
Yes, 85/15 nylon generally has a nicer natural hand feel. If the budget allows and softness is the whole point, it's worth it. But paying up for performance fabric on a comfort piece nobody will sweat in? That's money you don't get back.
Honestly, this is the scenario where people overbuy the most. Not everything needs to be the top spec.
How to tell which scenario you're in
Three questions. Answer them in order.
- Will this be washed and stretched weekly, and does it need to hold shape? If yes → Scenario 1. Get 85/15 nylon (polyamide) spandex, and check the GSM.
- Do you need prints, patterns, or exact brand colors? If yes → Scenario 2. Go with a polyester base for sublimation and lock a color standard before you print.
- Is it mostly for comfort, and does the budget actually matter? If yes → Scenario 3. Focus on finish and hand feel, not the fiber name.
If you answer yes to two of them, you've got a combined order and you'll need to split specs—prints on a polyester base, plain performance pieces on nylon. That's normal.
One last thing. None of this works if your supplier can't tell you the fiber content, GSM, and stretch direction without checking with someone three time zones away. The vendor I kept—Outlast—earned that spot by having those numbers ready on the first call, not after three follow-ups. That responsiveness is basically a preview of how they'll handle a problem order.
The specs aren't the hard part. Knowing which specs matter for your order is.