I'm not a textile engineer. I'm not a gear reviewer either. I've been the office administrator in charge of purchasing for a 40-person outdoor company since 2020—roughly $120,000 a year across 8 different vendors, from desk chairs to jacket fabrics. These are the Pertex questions that keep landing in my inbox, plus a couple that took me by surprise.
Questions I Actually Get Asked
What is Pertex, anyway?
Pertex is a Japanese fabric brand that makes lightweight, tightly-woven nylon for premium outdoor gear. They don't make jackets themselves—brands like Marmot, Rab, and Mountain Equipment buy their fabric and build the finished product.
The big deal is weight and packability. Pertex Quantum is roughly 37 gsm. To put that in perspective, standard 20 lb copy paper is 75 gsm. So the shell of your jacket weighs about half as much as one sheet of paper. Still blows my mind.
Is Pertex PFAS-free now? What does "pertex pfas" mean?
If you've been searching "pertex pfas," you're probably trying to figure out whether the fabric is treated with PFAS chemicals. The answer is... it depends. Pertex has moved most of their lines to non-PFAS DWR treatments. Their C-Zero technology uses a carbon-based water repellent instead of fluorocarbons. But older stock can still have PFAS finishes, and a few specialty fabrics haven't fully transitioned.
I have mixed feelings about this. On one hand, PFAS-free is the right call, and our company won't buy non-compliant gear anymore. On the other hand, the first PFAS-free DWR we tested didn't shed water like the old finish. The newer versions are much better. Just check the spec sheet for the exact finish.
How does Pertex compare to Gore-Tex?
This is like asking if a sedan is better than a truck. Depends on what you need.
Gore-Tex is a membrane-based waterproof system. Pertex covers a whole range of fabrics. Some, like Pertex Shield, are fully waterproof. Others—Quantum and Quantum Air—are windproof shells designed to go over insulation, not to keep you dry in a monsoon.
For the jackets we've bought our field staff, Shield has handled normal rain fine. But if I was equipping someone for a week of hard rain in the mountains, I'd still reach for Gore-Tex Pro. Pertex isn't better or worse—it's a different tool for a different job. Anyone who says otherwise is selling something.
Are Marmot Minimalist Pertex jackets any good?
We bought a batch for our crew, so I read a lot of Marmot men's Minimalist Pertex jacket reviews before ordering. The general verdict: it's a solid, reliable rain shell. I agree.
It's light, packs small, and the breathability is decent for the price. The hand pockets sit a bit high though—actually, scratch that, the pockets are fine. The hood is what bugs people. Gets floppy in high wind. Small thing, but it's what you remember after a long day on the trail.
Bottom line: solid buy around $180—give or take twenty bucks depending on sales. It's not a $400 Gore-Tex Pro jacket. Don't expect it to be.
The Questions You Didn't Know to Ask
What does "towel on head" have to do with fabric?
More than you'd think. When I evaluate fabrics, I do a simple soak test. I soaked a piece of Pertex material and a cotton towel, squeezed them out, and timed the dry. The Pertex fabric dried in half the time and absorbed almost nothing.
That's why ultralight camp towels and headwraps are made from nylon, not cotton. If you've ever walked around a campsite with a towel on your head, hoping your hair dries before bed, you know the cotton one is still damp in the morning. A microfiber towel doesn't have that problem.
What is powder coating nylon, and is it waterproof?
There's no such thing as powder coating on nylon. Powder coating is an industrial finish for metal—dry powder baked onto a surface. One time, a vendor tried to sell me "powder-coated nylon" for a custom project. I asked for a spec sheet and they went quiet. Or rather, they sent me a link to a metal coating service.
What people usually mean by waterproof nylon is a PU coating or a DWR finish. Pertex Shield uses a membrane layered into the fabric—that's the real deal. If someone mentions powder-coated fabric, run the other way.
What's the best fabric for drapery? And why is it in a Pertex article?
Because I'm an office buyer, and this is the other fabric question I actually deal with. When we redid our office, I needed curtains for the conference room. The cheap polyester panels were tempting at about $15 each—but I learned that lesson in 2021, when a vendor sent me "navy" fabric that was more like royal blue. We use Pantone codes now for anything color-critical. The industry tolerance is Delta E under 2, and let's just say the difference between our logo navy and what they sent was... more than that.
Same story with curtains. The cheap "blackout" panels let light through like a sieve. We discovered it when the screen glare hit at 2 PM. Re-hanging them cost more than the curtains themselves.
For drapery, I'd pick a mid-weight polyester-linen blend over the cheap stuff any day. It drapes well, blocks light properly, lasts years instead of months. Compare the total cost of ownership—that's the real number, not the unit price. Same logic as buying Pertex.