How to Wash Nylon Without Heat Damage or Yellowing
Nylon shows up in everything from windbreakers and swimwear to hosiery and backpacks. It's one of the strongest synthetic fibers, but it has two specific weaknesses — heat and sunlight — and once you respect those, nylon is nearly indestructible in the wash.
Key takeaways
- Nylon's two weak points are heat and UV light — wash cold and dry low, indoors.
- White nylon yellows in sunlight and from chlorine bleach; use oxygen bleach instead.
- A mesh bag prevents snags on hosiery and lingerie.
- Skip fabric softener on technical/rain nylon — it kills water repellency.
Cold Wash, Low Heat
Nylon is thermoplastic: heat is what degrades it, not washing.
| Setting | Use |
|---|---|
| Wash temp | Cold to warm |
| Cycle | Gentle or normal; mesh bag for hosiery/lingerie |
| Dry | Low heat or air dry — high heat weakens fibers and sets wrinkles |
Turn items inside out to protect coatings and prints.
Whites Yellow in Sunlight
White nylon yellows with UV exposure and with chlorine bleach. Dry nylon whites indoors or in shade, and use an oxygen bleach rather than chlorine to brighten. Once nylon has yellowed from bleach, it usually can't be reversed.
Static and Snags
Nylon attracts static and snags easily. A mesh wash bag protects fine items, and air drying eliminates most static. Fabric softener helps static but reduces water-repellency on technical nylon — skip it on rain gear.
Never Do This
- Don't tumble on high heat — it permanently weakens and shrinks nylon.
- Don't dry white nylon in direct sun.
- Don't use chlorine bleach; it yellows the fiber irreversibly.