How to Choose Sustainable Swimwear: What to Look For & Why It Matters

Why Sustainable Swimwear Matters

Every time you step into the ocean, you become part of its ecosystem. The swimwear you choose can either protect that ecosystem — or harm it. From microplastic shedding to toxic dyes that leach into waterways, conventional swimwear has a hidden environmental cost. The good news? Sustainable swimwear has come a long way, and choosing it doesn't mean sacrificing style.

What Makes Swimwear Truly Sustainable?

Not all "eco-friendly" labels are created equal. Here's what to actually look for:

1. Recycled or Regenerated Fabrics

Look for swimwear made from ECONYL® (regenerated nylon from ocean waste), recycled polyester from plastic bottles, or other certified recycled materials. These fabrics give ocean waste a second life while reducing demand for virgin petroleum-based fibers.

2. Reef-Safe Dyes & Finishes

Conventional fabric dyes can contain heavy metals and chemicals that are harmful to marine life. Sustainable brands use low-impact, reef-safe dyes that won't leach toxins into the water when you swim.

3. Ethical Manufacturing

Sustainability isn't just about materials — it's about people too. Look for brands that are transparent about their supply chain, pay fair wages, and operate in safe working conditions.

4. Durability & Longevity

The most sustainable piece of clothing is one you wear for years. High-quality construction, chlorine resistance, and colorfastness all contribute to a swimsuit that lasts — keeping it out of landfill longer.

5. A Mission Beyond the Product

Some brands go further, donating a portion of proceeds to ocean conservation, partnering with environmental nonprofits, or actively participating in beach cleanups. When you buy from these brands, your purchase does double duty.

Our Approach at Under The C Swim

At Under The C Swim, sustainability isn't a marketing strategy — it's the reason we exist. Every piece in our collection is designed with the ocean in mind, from the materials we choose to the shark and ocean conservation mission at our core. We believe that the ocean deserves to be protected by the people who love it most.

Ready to make the switch? Shop our Resort 2026 Collection and find your perfect sustainable swimsuit.