This was accurate as of January 2025. The technical outerwear fabric market changes fast, so verify current availability and pricing with your supplier before finalizing a spec sheet.
If you're specifying fabrics for a new outerwear line, you've probably come across the name Pertex. And if you've done any digging, you've also run into the common advice that 'Pertex Quantum is the lightweight choice' and 'Pertex Shield is the waterproof one.'
It's tempting to think the decision is that simple. But the reality is that 'Pertex' isn't a single fabric—it's a family of distinct technologies designed for very different applications. Picking the wrong one for your product (say, putting a pure insulation fabric into a rain jacket) will lead to performance issues, returns, and a damaged relationship with your end customer.
Over the past four years, I've reviewed roughly 200+ unique garment specs annually as a quality and brand compliance manager. I've rejected an estimated 8% of first deliveries in 2023 alone due to the wrong fabric spec for the intended use case. So, let's break down the three main scenarios you'll face—and which Pertex series fits best.
The Three Main Decision Scenarios
There isn't a single 'best' Pertex fabric. The right choice depends entirely on what you're building. I group the decisions into three main buckets:
- Scenario A: You're making a waterproof hardshell or a rain jacket. Waterproofing and breathability are non-negotiable. You need a membrane-based fabric.
- Scenario B: You're making an insulated jacket or sleeping bag. Weight, packability, and down/feather retention are the priorities. You don't need a waterproof membrane (and adding one would compromise breathability for active use).
- Scenario C: You're making a softshell or a mid-layer for active, mixed-weather use. You need a balance of weather resistance (wind, light rain) and breathability. A fully waterproof membrane would be overkill and uncomfortable.
Let's walk through each scenario.
Scenario A: The Waterproof Outer Layer (Hardshells & Rain Jackets)
If you need a garment that keeps the wearer dry in a downpour, you're looking at Pertex Shield or Pertex ShieldAir.
Pertex Shield is the workhorse. It's a PU (polyurethane) membrane laminated to a face fabric. It's durable and provides reliable waterproofness (typically rated at >10,000mm hydrostatic head). In my experience, Shield is a solid choice for a first waterproof line or a budget-conscious product.
But if you want to compete with premium brands—Goldwin, Marmot, The North Face—you need Pertex ShieldAir. ShieldAir is a newer, air-permeable membrane. The critical difference: ShieldAir allows moisture vapor (sweat) to escape more efficiently than the standard PU membrane.
In a Q1 2024 blind test we ran with our design team, comparing a ShieldAir jacket to a standard Shield jacket (same silhouette, same seam taping), 78% of testers identified the ShieldAir jacket as 'more comfortable during active wear' without knowing the difference. The cost increase was roughly $4 per piece. On a 50,000-unit annual order, that's $200,000 for measurably better breathability and brand perception.
The advice I'd give: For a budget or entry-level line, standard Shield is fine. For a premium placement where your customer is paying >$300 retail, ShieldAir is becoming the industry standard. What was a 'nice to have' in 2022 is expected in 2025.
Scenario B: The Lightweight Insulated Piece (Puffer Jackets & Sleeping Bags)
This is where the 'Pertex Quantum' advice comes in—but it's not the whole story.
For a puffer jacket or a sleeping bag, you need a fabric that is lightweight, wind-resistant, and stops down/polyester fibers from poking through (the 'downproof' factor). That's the core job of the Quantum series.
There are three main variants, and choosing wrong can ruin a product.
- Pertex Quantum: The original. Lightweight (approx. 35-40 g/m²), downproof nylon. Perfect for a classic, lightweight down puffer. It's not waterproof—a heavy rain will wet it out eventually.
- Pertex Quantum Air: More breathable. Same downproof qualities, but with a more open weave for active insulation (e.g., a breathable insulated mid-layer for hiking). The wind resistance is lower.
- Pertex Quantum Pro: More durable. This is the one I'd spec if your jacket is going to be used for alpine climbing or bushcraft. It has a tougher ripstop weave (often thicker denier, like 20D or 30D). It sacrifices some packability for ruggedness.
A mistake I saw in 2023: a brand used standard Quantum for a tactical insulated jacket aimed at the outdoor market. They thought 'lightweight' was always better. The resulting product was too fragile for daily carry use; zipper pulls and fabric snags led to a 12% return rate in the first quarter. It cost us $22,000 in redo costs for the next batch. Every contract now includes a minimum denier spec for that customer.
The advice I'd give: For a lightweight urban puffer, use standard Quantum. For an active, breathable mid-layer, use Quantum Air. For a piece that needs to survive abrasion (military, alpine, hunting), use Quantum Pro. The 'simple' advice of 'use Quantum' ignores these three distinct needs.
Scenario C: The Mixed-Use Active Layer (Softshells & Alpine Mid-Layers)
What if you need a fabric that is wind-resistant and sheds light drizzle, but is also breathable for high-output activity like skiing or hiking? Don't use Shield (too waterproof, not breathable enough for active sweating). Don't use Quantum (not wind-resistant enough). Use Pertex Equilibrium.
Equilibrium is a clever fabric. It uses a double-weave structure: a tightly woven outer face to block wind and light moisture, and a more open inner face to wick moisture away. It's stretchy, comfortable for active use, and has a soft hand feel.
Why this is different from the 'standard' advice: There's a growing belief in some corners of the outdoor industry that you need a full waterproof membrane for everything. That's a legacy myth from the era when Gore-Tex was the only game in town. For a ski touring jacket or a running softshell, a fully waterproof membrane traps too much heat and moisture, leading to sweat-soaked insulation. Equilibrium solves that problem.
To be fair, Equilibrium isn't for everything. It's not a substitute for Shield in a torrential downpour, and it's not as packable as Quantum for a puffer. But if you're making a jacket for 90% of the conditions an active user faces (wind, light snow, drizzling rain), it's actually a better performer than a full hardshell.)
The advice I'd give: Spec Equilibrium for any garment where the wearer will be generating significant body heat (skiing, mountaineering, trail running in cold weather). It outperforms other fabrics in breathability while still providing meaningful protection.
How to Determine Which Scenario You Are In (Your Decision Guide)
Here's the framework I use when reviewing a new spec sheet. Answer these three questions:
- What is the primary function of this garment?
- If the answer is 'keep dry in a rainstorm' → Proceed to Scenario A (Shield/ShieldAir).
- If the answer is 'packable insulation for layering' → Proceed to Scenario B (Quantum/Air/Pro).
- If the answer is 'comfort during active movement in variable weather' → Proceed to Scenario C (Equilibrium). - What is the desired retail price point?
- Under $200 retail? You might be able to use standard Shield or standard Quantum. You really can't afford ShieldAir or Quantum Pro for your margins.
- Over $300 retail? I'd argue that ShieldAir or Quantum Pro are almost mandatory for the premium consumer. Anything less feels dated. - What is the intended end-use scenario?
- Urban commute, light use: Standard Quantum or Shield is fine.
- Backpacking, climbing, wilderness: You need the durability of Quantum Pro or the breathability of ShieldAir.
I'd argue that most product failures I've seen aren't because a brand picked a 'bad' fabric. They picked a good fabric for the wrong job. Use this framework to ensure you're buying the right Pertex for your specific line. (Should mention: verify availability with your Pertex rep, as specific series like Equilibrium have had some supply chain volatility in late 2024.)