O2FiNiTY Fin Blades – Fiberglass and Carbon at a Fair Price

O2FiNiTY fin blades offer freedivers a high-quality alternative to traditional carbon or fiberglass fins – technically refined, functionally minimal, and priced to support ambitious training on any budget. Designed for maximum efficiency with minimal material, these blades stand for clean performance without unnecessary design elements.

Premium Materials – No Compromise

Choose between durable fiberglass or high-performance carbon – both provide excellent rebound, longevity and precise underwater feedback. We focus on a purist aesthetic: carbon fibre remains visible, letting the material speak for itself. Various weaves create individual visual dynamics – without print or added graphics. The O2FiNiTY logo is discreetly placed on the underside of the blade.

Four Variants – Matched to Your Diving Style

Fiberglass Translucent

Semi-transparent fiberglass with balanced flex and smooth recoil. Ideal for beginners or divers seeking reliable performance with proven material.

4K Twill Carbon

Made from carbon tow with 4,000 filaments. The twill weave creates a diagonal pattern with elasticity and responsive finning. Easy to control – ideal for medium depths and technical training.

8K Plain Carbon

This weave uses 8,000 filaments per tow, making it denser and stiffer. The plain pattern ensures uniform surface and direct power transfer. Perfect for dynamic disciplines and experienced freedivers.

3D Jacquard Carbon

Technically and visually unique. The Jacquard weave gives the blade a structured, modern appearance with solid rebound and stable flex. For divers who want to stand out – without compromising pure carbon performance.

4K vs. 8K Carbon – What Does It Mean?

The 4K and 8K labels refer to the number of carbon filaments per tow:

• 4K = 4,000 filaments – more flexible, lighter, more responsive

• 8K = 8,000 filaments – stiffer, denser, more efficient

The higher the number, the more material and stiffness – impacting your finning feel, reactivity and style.

Universal Compatibility – Foot Pocket First

A fin blade is only as good as the foot pocket you pair it with. O2FiNiTY blades are compatible with these three leading systems:

• Mares X-Wing
• CETMA s-WiNG
• C4 250

Start by selecting the foot pocket that fits your foot – every foot is different. Then fine-tune your setup with the O2FiNiTY blade. The result: optimal comfort and efficient power transfer.

Conclusion: O2FiNiTY blades stand for reduced design, premium materials and smart modularity. Whether fiberglass or carbon, 4K or 8K – choose what suits your style. At a price that leaves room for what really matters: time in the water.