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The PRO Hyper Bifins Fiberglass are our most customizable bifins ever with the addition of our ‘hyper’ monofin foot pockets, named after Andronov’s hyperboloid for the monofin-specific construction created in the 2000s by Evgeniy Andronov. Personalize your blade and accent color, blade size, blade stiffness, and choose between standard-sized or customized foot pocket size, fit, and angle.

These ‘hyper’ foot pockets are the foot pockets we use on our monofins. They contain the same comfortable micropore lining inside and optional arch support as our lighter bifins foot pockets. Differences include an additional amount of rubber to build this new form and a 30° angle attachment to the blade to help you perform a stronger back kick. Additionally, the foot pockets have more of a ‘spring-like’ effect due to the additional volume of rubber and optimized stiffness of fiberglass inserts in the foot pockets. These features give you more distance with each kick and a better transition of energy from the feet to the blade.

The PRO Hyper Bifins Fiberglass feature a durable fiberglass blade that is in the top-performance range for both fiberglass and carbon blades overall. Slight adjustments have been made to the blade layers and shape to support this new foot pocket type. The soft and medium stiffness options are ideal for freedivers who use an ankle-driven technique that focuses on an efficient front and back kick. Available in 6 bold accent colors.

For a full guide on each customization option and to understand what is right for you, see the ‘Size and Customization Guide’ section below.

For freedivers who desire high-performance bifins with foot pockets that are lighter and have less volume, we recommend the lightweight Competition Bifins 2x Carbon (CB2x Carbon).


Details and Materials

  • Materials: 100% UHC fiberglass
  • Handcrafted from start to finish
  • Hand-layered blades for superb response and feel
  • Ideal for freedivers who use a quad-driven technique with a strong front kick and less focus on the back kick, allowing you to put more load on your hip muscles
  • Molchanovs Hand-Built Foot Pockets:
    • Heavy-duty, wear-resistant, and UV-resistant
    • Custom open-heel foot pockets for flexibility
    • Comfort Lining interior with soft micropore for maximized comfort
    • Increased toe space for added relief
    • Same foot pockets we use on our monofins to allow more load to be placed on the hips
    • Engraved Molchanovs logo on the front
    • Choose between standard EU sizes or custom sizes


Technical specifications

  • Small blade:
    • Foot pocket Angle: 30° standard angle
      • Can be customized to 25° and 35°
    • Total Length (depending on foot pocket size): 79 - 84cm (31.1 - 33.1in)
    • Blade Length (from tip of foot pocket to end of blade): 62cm (24.4in)
    • Blade Width: 17.5cm (6.9in)
    • Stiffness:
      • Soft
      • Medium
  • Regular blade:
    • Foot pocket Angle: 30° standard angle
      • Can be customized to 25° and 35°
    • Total Length (depending on foot pocket size): 80 - 85cm (31.5 - 33.5in)
    • Blade Length (from tip of foot pocket to end of blade): 63cm (25in)
    • Blade Width: 19cm (7.5in)
    • Stiffness:
      • Soft
      • Medium
    • Weight (one pair): 2.3kg (5.1lb)
  • Accent Colors: Black, White, Gold, Blue, Green, Pink


Custom Hand-Built Foot Pocket Measurement Guide

Custom Foot Pocket Fit Guide
The desired fit determines the tightness of the foot pockets. Three options are available:

Comfortable: Allows more space inside of the foot pockets for the feet. The feet will feel like they are on the verge of movement, but will not actually have movement since any friction between the feet and foot pockets will cause blisters. Comfortable for about 2 hours of wear.

Normal: More comfortable compared to the Tight fit. There is slightly more space inside for the feet, but not enough space for extra movement. Allows for about 20 - 50 minutes of wear.

Tight: Specifically designed for performance, which means that the fit is especially tight. This gives you the best control over the blade as the feet are very compressed with no space for any extra movement inside of the foot pocket. Suitable for about 10 - 30 minutes of wear.

Please note: The maximum time a freediver can wear foot pockets (especially Tight fit) depends on their level of experience and how flexible their feet are. If you would like to improve your foot flexibility, watch this video.

Choosing Bifin Blade Stiffness
Blade stiffness depends on your height, weight, technique, experience, training goals, and blade size. Below are general tips on how to choose the right stiffness. If you are not sure, e-mail with a video attached of one of your dives for a recommendation.

Soft: Suitable for smaller and lighter freedivers, and also for experienced freedivers with excellent ankle-driven technique. Softer blades are more economic in terms of energy consumption, although it mostly remains a preference among freedivers with more strength whether to choose a soft or medium stiffness.

Medium: Suitable for larger and heavier freedivers, freedivers with more lower-body strength, or for freedivers who needs more power.

Choosing Bifin Blade Size
We also offer the choice of a Small bifin blade for freedivers who are under 65kg (143lb), shorter than 170cm (5 feet 11 inches), or with shorter leg proportions. Small blades feature 10% less surface area than Regular blades and an adjusted ‘bottleneck’ shape. They are particularly ideal for shorter freedivers because of their ease of maneuverability while additionally requiring less power and energy spent on kicks. While the blade-layering structure of both Small and Regular blades are the same, the reduced surface area of the Small blade can make them feel softer than Regular blades.


Choosing Foot Pocket Angle
The standard 30° footpocket angle will emphasize the back kick. If you have very flexible ankles, we recommend you choose a 25° footpocket angle to balance the load between the ankles and hips. For stiffer, less flexible ankles, choose a 35° angle.

Molchanovs PRO HB 玻璃纖維雙蹼

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