Silicone Bifins 2

The Silicone Bifins 2 are the next generation of our best-selling training bifins, built with feedback from thousands of freedivers worldwide. The blade geometry has been updated for a firmer, more powerful kick, while a new adjustable heel strap means the fit works for more feet—with or without neoprene socks. Hypoallergenic silicone, an anatomical open-heel foot pocket with arch support, and a blade design inspired by our competition fins make these the most versatile silicone training fins on the market, whether you’re a beginner building technique or an advanced freediver refining it.

Please note:
Bright colors may fade over time when exposed to sunlight. To minimize fading, rinse and store fins away from direct UV light when not in use.

Firmer, more powerful blade
Updated blade geometry delivers a more stable, efficient kick than the previous generation. This results in better propulsion for both pool training and open water, while remaining soft enough for technique-focused training at every level.

Stabilizing blade rails
Eight blade rails with a specific curvature profile distribute stiffness across the blade for maximum efficiency with minimum effort, inspired by the geometry of our PRO Line carbon bifins.

Anatomical foot pocket
Dedicated right and left foot pockets with arch support keep your foot in the optimal pointed-toe position while finning, maintaining efficiency and preparing you for a seamless transition into performance bifins. The soft silicone construction means the foot pockets won't dig in or irritate, so you can focus on technique rather than your feet.

Open-heel design
An open-heel foot pocket gives you the correct ankle-to-foot position while finning, along with a full range of motion through each kick.

Adjustable heel strap
A new adjustable heel strap lets you customize the fit for your foot, whether you prefer a snug fit, dive with neoprene socks, or need extra room for comfort.

Hypoallergenic silicone
UV-resistant, hypoallergenic silicone performs at any water temperature and won't degrade in the pool or the sea. A new, more durable and flexible formula allows for a thinner blade than the first generation silicone bifins.

Details and Materials

• Hypoallergenic and UV-resistant silicone
• Firmer blade geometry for improved propulsion and hydrodynamic stability
• New adjustable heel strap for a customizable, secure fit with or without neoprene socks
• Can withstand -30°C (-22°F) temperatures without deforming
• Anatomical right and left foot pockets with arch support for optimal foot position during the kick stroke
• Open-heel foot pocket for correct ankle-to-foot positioning and full range of motion
• Anatomical back strap shape for a comfortable fit over the Achilles tendon
• 8 blade rails with specific curvature profile and stiffness distribution inspired by Molchanovs PRO Line carbon bifins
• Molchanovs minimalist design

Technical Specifications

• Total Length: 46.3–58.8cm (18.2–23.1in)
• Blade Length: 27.7–35.2cm (10.9–13.9in)
• Blade Width: 17.9–22.2cm (7–8.7in)
• Weight (one pair): 1.6–1.8kg (3.5–4lb)
• Colors: Black, Blue, White, Coral

Care Instructions

All equipment should be rinsed in fresh water after use and placed out of direct sunlight and heat. Do not place heavy objects on top of the bifins and avoid placing bifins near sharp objects. For more information, please see how to care for your freediving bifins and monofin. Additionally, see how to travel with your bifins and monofin.

For more detailed care information, see the full list of product care instructions.

Warranty Policy

A 2-year limited warranty applies. Please note that defects or damage to the equipment caused by improper or incorrect use or insufficient/improper maintenance and product care will render our warranty policy null and void.

Production Time

If the product is currently in stock, it will be sent out to you within 2 - 5 business days. If the product is out of stock, we will contact you by e-mail to inform you about possible delays. If you order this product along with another product that has a longer production time, your entire order will be shipped with all of the items together once the product with the longest production time is ready.

Shipping and Returns

See the Shipping and Returns section of the FAQ.