11 Sustainable One-Piece Swimsuits For Cute Coverage (2025)

Looking to dive into summer with style and a clear conscience? We’ve rounded up the best sustainable one-piece swimsuits of 2025 that give you all the coverage you want without compromising on cute. Whether you’re heading to the beach, the pool, or a weekend getaway, these suits are flattering, planet-friendly, and ready to make waves 🌊.

1. Summersalt – The Sidestroke

• Price: $95
• Fabric: Recycled polyamide from post-consumer waste
• Why We Love It: Known for its insane fit and bright color-blocking, this one-piece is universally flattering and ranks high in both comfort and style.

2. Vitamin A – The Demi One-Piece

• Price: $185
• Fabric: EcoLux™ – a superfine matte jersey made with recycled nylon
• Why We Love It: A classic silhouette with a deep scoop back. Bonus: every purchase helps support ocean conservation.

3. Wolven – One-Piece Swimsuit in Amalfi

• Price: $138
• Fabric: Post-consumer recycled plastic bottles (RPET)
• Why We Love It: Bright, bold prints and fully reversible – it’s like getting two suits in one.

4. Reformation – One-Piece in Ink

• Price: $128
• Fabric: ECONYL® regenerated nylon
• Why We Love It: Minimalist chic meets sustainable innovation. Perfect for lounging or layering with linen pants.

5. Girlfriend Collective – The Sideline One-Piece

• Price: $88
• Fabric: 77% recycled polyester
• Why We Love It: Compression fabric for a supportive fit, and sizes go up to 6XL 💪.