Key takeaways
- Pertex Quantum is a lightweight, tightly woven nylon shell/lining fabric.
- Its dense weave is downproof, wind-resistant, and lightly water-resistant.
- It's soft, light, and packable while protecting the insulation inside.
- Common as the face/lining of premium down and synthetic insulated jackets and sleeping bags.
Pertex brand fabric line.
What Pertex Quantum is
Pertex Quantum is a lightweight, tightly woven nylon fabric from Pertex, used primarily as the shell and lining of insulated jackets and sleeping bags. Its dense weave is downproof, wind-resistant, and lightly water-resistant, while staying soft, light, and packable.
Why brands use it
- Downproof — the tight weave keeps down from poking or leaking through, essential for a down shell.
- Wind-resistant — blocks wind that would steal warmth.
- Light & packable — protects the insulation without adding bulk.
A buyer sees a down jacket spec list a ‘Pertex Quantum shell’ and knows it’s a fine, downproof, wind-resistant nylon — light and soft, woven tightly enough to keep the down in and the wind out.
Where it’s used
Pertex Quantum is most common as the face and lining of premium down and synthetic insulated jackets and sleeping bags, often in a ripstop weave. Pertex makes other lines (like the airier Microlight) for different jobs.
The bottom line
Pertex Quantum is the lightweight, downproof nylon that wraps many premium insulated jackets and sleeping bags — dense enough to keep down from leaking and to block wind, yet soft, light, and packable. When you see it on a spec sheet, it signals a quality face fabric chosen to protect and contain insulation without weight.
Frequently asked questions
What is Pertex Quantum?
Pertex Quantum is a lightweight, tightly woven nylon fabric made by Pertex, used mainly as the outer shell and inner lining of insulated jackets and sleeping bags. Its dense weave is downproof, wind-resistant, and lightly water-resistant, while remaining soft, light, and packable — a popular premium face fabric for insulated gear.
What does 'downproof' mean for Pertex Quantum?
Downproof means the fabric is woven tightly enough that down feathers can't poke or leak through it. This is essential for a down jacket or sleeping bag shell, because it keeps the down contained inside the baffles rather than escaping through the fabric. Pertex Quantum's dense, fine weave achieves this while staying lightweight.
Where is Pertex Quantum used?
It's most common as the shell and lining fabric of premium down and synthetic insulated jackets and sleeping bags, where its combination of light weight, downproofness, wind resistance, and softness protects and contains the insulation without adding bulk. Pertex makes other lines (like the airier Microlight) for different uses.
Sources
- Pertex fabric technology — Pertex
- Gear fabrics — The Mountaineers