Every time someone asks me what the best fabric is, I want to answer with another question: what are you actually making?
I'm a procurement manager at a mid-size apparel company. I've managed our fabric budget for six years, about $420,000 a year. I buy technical outerwear fabrics, linings, and sometimes I help people with upholstery and flags. That last part sounds random, but when you work in fabric sourcing, the questions get weird.
People ask about Pertex Quantum. They ask whether Pertex Shield is better than Gore-Tex. They ask what a good upholstery fabric is. And one question I get a lot is what the best fabric for an outdoor flag is.
These are not the same question. The honest answer to all of them is that it depends. But that phrase is annoying. So let me show you the framework I use instead.
There are three common situations here. If you're making a rain jacket, you're in scenario one. If you're covering a couch, scenario two. If you're buying a flag, scenario three. They have different fabrics for different reasons.
Pertex is not one fabric. That solves half the confusion.
Before comparing anything, understand that Pertex is a family of fabrics, not a single material.
Pertex Quantum is ultra-light nylon. It's about saving weight and packing down small. It's used in sleeping bags, down jackets, and quilts.
Pertex Shield is a waterproof membrane system. It's used in rain shells and winter outerwear.
Pertex Equilibrium is a stretchy, breathable soft-shell fabric. It's meant for active movement and mild weather.
Asking if Pertex is good is like asking if steel is good. It depends on what you're building. There are also many versions inside each family. A 10-denier Quantum fabric is not the same as a 30-denier Quantum Pro. A two-layer Shield is not the same as a three-layer Shield. If you see only the brand name and not the spec sheet, you're guessing.
Pertex Shield vs Gore-Tex: What a fabric buyer actually looks at
This is probably the most common Pertex question I get. People want a winner.
Pertex Shield and Gore-Tex are both waterproof breathable membrane systems. Both can be built into jackets, pants, and mitts. The difference is not about good versus evil. It's a set of trade-offs.
In my experience, Pertex Shield often feels lighter and packable. That makes it a great option for running jackets, packable travel shells, and ski touring layers. Gore-Tex has broader name recognition, a longer track record, and a lot of warranty infrastructure. On a spec sheet, both can hit a waterproof rating. The real question is how much abuse you expect.
I don't have hard data on long-term membrane failure rates across every brand. What I can tell you anecdotally is that for 80% of everyday use, Shield is pretty good. For the other 20%, like alpine mountaineering where a seam failure is dangerous, I'd lean toward a burlier construction. That's not a marketing verdict. It's risk management.
From a cost standpoint, Shield tends to be a little less expensive than comparable Gore-Tex laminates. I want to say 10 to 20 percent, but don't quote me on that. Pricing changes with volume, order timing, and the mill. What matters is total cost: the price per yard, the yield loss, the stitching difficulty, and the return rate. A low-cost fabric that fails is expensive.
So if you're choosing between Pertex Shield and Gore-Tex, stop asking which is better. Ask which is better for your use case. Lightweight and packable? Pertex Shield. Maximum brand trust and hard-wearing reassurance? Gore-Tex.
Is Pertex Quantum waterproof? No, and here's why that's fine.
Short answer: no.
Pertex Quantum is not a waterproof membrane. It's a lightweight nylon face fabric with a DWR finish. DWR makes water bead up and roll off. It resists light drizzle. It does not keep you dry in sustained rain.
A true waterproof jacket uses a membrane, plus sealed seams, plus a waterproof zipper or flap. Quantum doesn't have that. It's designed for down jackets and sleeping bags. It needs to block wind, keep insulation in place, and pack down tiny. It doesn't need to survive a downpour.
It is not a waterproof membrane. Or rather, it's not a hardshell fabric. Let me rephrase: Quantum is a face fabric, not a waterproof system.
I think the confusion happens because Quantum is often used on the outside of a jacket that has another insulation layer. The jacket may be warm, and the outer feels smooth and crisp. So people assume it's a shell. It isn't.
If a brand calls a Pertex Quantum jacket waterproof without a membrane, be suspicious. According to the FTC's advertising guidance, waterproof claims have to be substantiated. In my first year of buying, I made the rookie mistake of seeing DWR on a spec sheet and thinking that meant rain ready. It didn't. That sample run soaked through, and the redo cost roughly $1,200.
There are versions like Quantum Pro that are tougher and more water-resistant. But water-resistant is not waterproof. If you need a hard shell, look for Pertex Shield, not Quantum.
What about a good upholstery fabric? Spoiler: Pertex is not it.
Here's a sentence I never thought I'd write as an outdoor fabric buyer: Pertex is not a good upholstery fabric.
Upholstery fabric has a different job. It needs to stand up to abrasion, sunlight, spills, sharp objects, and years of pressure. Pertex is engineered to be light and compressible. Those goals are basically opposites.
I don't have hard data on Pertex's Martindale rub count, but lightweight technical nylons usually fail far below upholstery standards. A coat might touch your body for eight hours. A couch touches your body for years. They're different sports.
So what is a good upholstery fabric? Let me separate the two common answers:
Woven viscose fabric: pretty, but know its limits
Woven viscose fabric gets used in upholstery a lot because it's soft, breathable, drapes nicely, and takes color well. It feels more expensive than it costs. For a dining chair, a reading nook, or a formal sofa, it can be a smart choice.
But pure viscose has real limitations. It can fade in direct sunlight and abrade faster than polyester or nylon. If a fabric seller quotes a rub count, that gives you a useful baseline. I want to say heavy residential use usually starts around 20,000 Martindale cycles, but don't quote me on the exact number. Ask for it. A low-count viscose might look great in a sample photo and fail in a sunny room.
In 2024, I compared three suppliers for a small office upholstery project. One offered a woven viscose at $18 per yard. Another offered polyester at $14. The viscose felt much nicer. But after checking the expected rub count and the seating schedule, the polyester was the lower total cost. The client still talks about the fabric sample they didn't choose. But that sample would've been saggy and faded within two years.
So if you're asking about good upholstery fabric, my honest advice is: match the fiber to the room. Woven viscose for low-traffic places where appearance matters most. Polyester or a poly-cotton blend for real life.
What is the best fabric for an outdoor flag?
Outdoor flags are another topic that gets everyone opinionated. My answer from a cost perspective: woven polyester, usually.
Flags face a weird combination of UV, wind, rain, and constant flapping. Nylon is lighter and flies in a small breeze. It also prints brilliantly. But nylon can fade and fray faster than a heavier polyester in strong sun.
Polyester, especially a woven polyester with a canvas header and brass grommets, tends to last longer in harsh conditions. It's heavier, so it doesn't fly as dramatically in dead-calm air. But a flag is a fixed cost. Replacing it every year is worse than buying a heavier flag that lasts four.
I once watched a business buy a cheap nylon flag because it looked bright in a web photo. It did, for about a month. Then the sun hit it, and the color turned washed out. That's not a quality scandal. It's a material mismatch.
And Pertex? Do not use Pertex for an outdoor flag. It's too light, too expensive, and too technical. A flag doesn't need breathable waterproofing. It needs mass, UV resistance, and abrasion tolerance.
How to tell which scenario you're in
If you're still not sure, use three questions:
- Where will this fabric live? On your body, on a sofa, or outside?
- What is trying to damage it? Rain, sun, friction, or grape juice?
- If I choose wrong, what does it cost me? A wet jacket, a faded couch, a shredded flag?
The answers will point you to the right family of fabrics.
Pertex is brilliant when you need lightweight performance. Pertex Shield is a solid choice for a rain shell. Pertex Quantum is not waterproof, but it's great in a down jacket. Woven viscose fabric is a legitimate upholstery option, but it has limits. And for an outdoor flag, woven polyester is usually the smartest buy.
There's no universal best fabric. There's only the fabric that fits the problem.
Get the spec right, and the brand argument mostly disappears.