I get asked a lot: Which Pertex fabric should I use for a coat?
The honest answer? It depends on your situation. Not just the weather forecast—but your actual use case, your timeline, and your willingness to accept trade-offs. There isn't a single "best" Pertex fabric. There is a best one for your next problem.
In my role coordinating materials for emergency outdoor gear production, I've seen the good, the bad, and the expensive when it comes to choosing shell fabrics. Let me break it down by the three most common scenarios I run into.
The Three Scenarios
These are the three distinct situations where I see people choosing Pertex, and each one demands a different answer:
- Scenario A: The True Emergency – You need a coat right now for a trip or event in < 48 hours. Durability and features are secondary to immediate availability.
- Scenario B: The “Set It and Forget It” Product – You're developing a garment for a brand. You can't afford returns. You need the most reliable, all-around fabric that will work for a broad customer base.
- Scenario C: The Niche Performance Requirement – You need a specific property (ultra-lightweight, extreme breathability, maximum burliness), and you're willing to deal with the compromises to get it.
Let's walk through each one.
Scenario A: The Emergency – When Time is Your Only Metric
In March 2024, a client called at 6 PM needing 300 jackets for a film crew heading to Patagonia. The shoot started in 36 hours. Normal turnaround? Two weeks. We found a supplier with Pertex Shield stock in a non-standard color (it was a sorta-grey-green). Paid $800 in rush fees on top of the $12,000 base cost. Delivered 30 hours later. The production coordinator's alternative was a $50,000 penalty clause.
In an emergency, your choice is simple: whatever is in stock and can ship guaranteed before your deadline.
This almost always means a standard, mid-weight fabric like Pertex Shield (the 2.5-layer or 3-layer version). It's the most widely stocked Pertex waterproof fabric. You won't get the ultra-light weight of Quantum or the specialized breathability of Equilibrium. But you will get a proven, bombproof shell that will keep you dry.
(Side note: The third time we faced this exact situation, I created a pre-approved stock list with three vendors. Should have done it after the first time.)
What you sacrifice in an emergency
- Color choice? Gone. You take what's available.
- Custom finishes (DWR type, face fabric texture)? Not happening.
- Bulk discounts? Nope. You're paying premium for speed.
- Testing before bulk production? Forget it. You're trusting the fabric's spec sheet.
The trade-off is clear: certainty of delivery vs. optimal product. For true emergencies, the right choice is the one that makes your deadline. Pertex Shield is my go-to here because it's the most likely to be available in volume on short notice.
Scenario B: The Reliable Product – When Returns Kill Your Margins
If you're a brand owner and you're picking a core fabric for a season, your priority isn't uniqueness—it's consistency and low complaint rates. I've tested six different shell options for stable knit jackets, and here's what actually works for the broadest set of users.
For this scenario, I'd recommend Pertex Equilibrium or Pertex Shield 3L.
Why not Quantum?
Quantum is incredible for its weight. But it's fragile. A customer who snags it on a ski edge or brushes against a sharp rock will be unhappy. For a general-use garment that goes to people who might not baby their gear, Quantum is a risk you don't need to take.
Our company lost a $45,000 contract in 2022 because we tried to save $1,200 by spec'ing a lighter Quantum Air fabric for a standard hiking jacket. The return rate hit 12% within six months. That's when we implemented our "Test under real abuse" policy before committing to a fabric for a core line.
Equilibrium is my dark horse for this slot. It offers a good balance of weather protection and breathability. It's not fully waterproof like Shield, but it's more breathable. For most hiking and everyday use, it's enough weather protection without the clamminess that some people complain about with full waterproof membranes.
What you sacrifice with a safe choice
- You won't have the absolute lightest jacket on the market.
- You might miss out on the novelty factor that sells a small batch of premium products.
- Your marketing team can't claim "world's most breathable fabric."
The trade-off here is reliability for reputation. You won't blow anyone away with specs, but you won't get a flood of returns either. For brands that need a workhorse fabric, Equilibrium or Shield 3L is the call.
Scenario C: The Niche Performance Requirement – When You Know Your Compromises
I have mixed feelings about niche performance fabrics. Part of me loves the technical achievement. Another part knows they're often chosen for the wrong reasons—a designer wants it because it sounds cool, not because the end user needs it.
But when you genuinely do need a specific property, ignoring it is a mistake. Here are the three main branches:
Branch 1: Ultra-Lightweight (Gotta Go Fast)
Pick: Pertex Quantum or Quantum Air
If you're building a thru-hiker's dream or a packable emergency shell, this is your fabric. The weight savings are real. A Quantum jacket can easily undercut a Shield jacket by 100+ grams.
The catch: It's not as breathable as Equilibrium, and not as durable as Shield. It's a specialized tool. I used a Quantum shell for a ten-day backpacking trip last summer (circa 2024). It was perfect for static use around camp or light hiking. On a bushwhack? I'd have shredded it in two days.
Branch 2: Maximum Durability (Bombproof)
Pick: Pertex Shield Pro or a heavier Shield variant
If your user will be dragging their pack through scree fields or working in a construction-adjacent environment, get a heavier face fabric. I'd spec a 3L Shield Pro with a burlier nylon face, not the 2.5L ultralight version.
The weight penalty is maybe 200 grams and $30-50 in cost. The cost of a single failure in the field? Potentially a lot more.
Branch 3: Extreme Breathability (Sweat Management)
Pick: Pertex Shield Air
High-output aerobic activities in wet conditions are the one place where I'd sacrifice some low-end waterproofing for better breathability. Shield Air is a membrane that allows moisture vapor to pass through more efficiently than standard Shield.
The trade-off: It's less waterproof. In a sustained, heavy downpour, a standard Shield jacket will keep you drier. But if you're hauling ass uphill in a Scottish drizzle, Shield Air is the more comfortable choice.
(Why does this matter? Because the wrong choice here leads to the user taking their jacket off—getting wet from rain instead of sweat. I've seen it happen.)
How to Decide Which Scenario You're In
Here's a simple three-question test. Answer honestly.
- What is my hard deadline? If it's under a week, you're in Scenario A, and the choice is dictated by stock. Stop worrying about material specs and start calling suppliers.
- How big is my production run vs. my risk tolerance? If you're making >500 units for an unknown customer base, you're in Scenario B. Pick the reliable option (Equilibrium or Shield 3L). The cost of a 5% return rate will dwarf any perceived benefit from a niche fabric.
- Do I know exactly what trade-off I'm making and for whom? If the answer is "yes" and you can articulate it clearly (e.g., "We are building a summit pack for fast alpine ascents, weight is the priority"), then you're in Scenario C. If you're vague about who the user is, you're likely in Scenario B and don't know it yet.
The question isn't which Pertex is the best. It's which Pertex best fits your specific constraints. A coat fabric that's perfect for a weekend storm might be a disaster for a rushed product launch. Knowing your scenario is half the battle.
A note on pricing (as of January 2025): Pertex fabrics are generally quoted on a per-yard basis for bulk orders. Expect a 15-25% premium for Shield Air over standard Shield, and a 10-15% premium for Quantum over Equilibrium. The cost difference is usually negligible per garment at wholesale. The real cost is in returns and missed deadlines. Choose accordingly.