C4 UP fins made from #tide ocean plastic – sustainable performance

Thanks to the exceptional elasticity and durability of #tide material, the C4 UP fins deliver responsive power transfer in the water. The progressive rail geometry, overmoulded directly onto the blade, ensures optimized thrust and controlled flow. With a blade size of 800 × 195 mm (910 mm for size 42/43) and a soft stiffness, the UP fins are ideal for long dives with reduced fatigue. They come with the C4 250 footpocket featuring a 3° preformed angle that supports a natural foot position underwater.

The UP fins were awarded Best Technopolymer Fin on the Market at the 2024 International Awards by Apnea Passion Magazine.

Technical Specifications

• Fin Material: #tide – 100% ocean-bound recycled plastic
• Blade Dimensions: 800 × 195 mm
• Awards: Best Choice 2024 by Apnea Passion Magazine
• Size 42/43: 910 × 195 mm
• Blade Hardness: Soft
• Rails: Progressive geometry, overmoulded on the blade

#tide – Made from 100% Ocean-Bound Plastic

C4 has partnered with #tide, a Swiss pioneer in transforming ocean-bound plastic into high-quality materials. Thanks to this partnership, C4 UP fins are made from #tide ocean material®, a 100% recycled technopolymer sourced from marine waste. This innovation allows us to create high-performance products that are environmentally responsible. C4 integrates #tide’s recycled pellets into the production of all plastic freediving fins.

The C4 UP fins set a new standard for sustainability and performance in freediving. Made entirely from recycled ocean plastic, they combine technical excellence with environmental care.

#tide processes the collected plastic locally and reduces CO₂ emissions by up to 80% compared to virgin plastic production. In collaboration with C4, this material creates fins that are functional, eco-conscious, and stylish.

With outstanding reactivity and durability, each kick becomes more efficient for a smoother and safer dive. By repurposing ocean-bound plastic, pollution is reduced, CO₂ emissions are cut, and local waste collection communities are supported.

Every choice matters.

Choose sustainability, choose performance, choose the future!

Thank you for your support!