Microplastics are becoming a more important topic for swimwear brands because most performance swimwear relies on synthetic fibers such as polyester, nylon and elastane. These materials provide stretch, recovery, chlorine resistance and durability, but they can also shed microfibers during washing and wear.
This article turns the topic into practical sourcing guidance. It supports the swimwear fabric selection guide and the recycled material discussion in the Econyl and sustainable fabric sourcing guide.
Why Swimwear Is Part of the Microfiber Discussion
Swimwear needs synthetic performance. Nylon-spandex and polyester-spandex blends are common because they stretch, recover and resist water exposure better than many natural fibers. The challenge is that synthetic textiles can release tiny fibers when washed or abraded.
What Brands Can Actually Control
Brands cannot solve the full microplastics issue alone, but they can make better sourcing and communication decisions. Practical controls include choosing higher-quality fabrics, avoiding low-durability materials, testing pilling and abrasion, and giving customers better care instructions.
- Ask suppliers about fabric durability and pilling tests.
- Use tighter, smoother fabrics where performance allows.
- Avoid vague claims such as “zero impact” unless they are fully supported.
- Include washing guidance that reduces unnecessary abrasion.
- Keep sustainability claims specific to the material and evidence available.
Recycled Fabric Is Not the Whole Answer
Recycled polyester or recycled nylon can reduce reliance on virgin resources, but recycled synthetic fibers can still shed microfibers. Buyers should treat recycled content as one part of a broader material strategy, not as a complete solution.
Questions to Ask Fabric Suppliers
- What is the fabric composition and GSM?
- Has the fabric been tested for pilling, abrasion and colorfastness?
- Is there documentation for recycled content or chemical safety?
- How does the fabric perform after repeated washing?
- Is the fabric suitable for the intended swimwear construction?
Buyer Takeaway
Microplastics should push brands toward better material discipline: durable fabrics, honest claims, clear testing and practical care guidance. The goal is not to abandon performance swimwear materials, but to source and communicate them more responsibly.