Patagonia and Outerknown are solid bets.

Yes, if you want actual recycled materials and ethical manufacturing, those two are the most reliable. Most “sustainable” beachwear is marketing fluff—vague promises, tiny recycled blends, and zero transparency.

Patagonia’s boardshorts and swim trunks use recycled nylon and polyester, and they back it up with third-party certifications (Fair Trade, Bluesign). Outerknown is built by surfer Kelly Slater, uses recycled fishing nets and organic cotton, and publishes factory lists. Both are expensive but last years.

Skip the Instagram brands that claim “eco-friendly” without any details. If they don’t say what percentage is recycled or which factory made it, assume it’s greenwashing.

You’ll pay $80–$120, but you won’t be replacing them next summer.