C4 SPORTECH FBG Fins

Sold in pairs

progressive response, ideal for energy saving and control

• Description

  The SPORTECH fins are specifically designed for freediving, offering the perfect balance between performance, comfort, and ease of use. Ideal for extended sessions, they suit a wide range of freedivers — from beginners to experts — and deliver excellent performance both in dynamic and deep diving.

  They share many technical features with the PROTECH model, such as the open-heel foot pocket, the anatomical design differentiated for right and left foot, and a monoblock structure that eliminates any empty space, ensuring maximum power transmission with every kick. Unlike the PROTECH model, designed for extreme performance and intended exclusively for competitive use, the SPORTECH fins deliver high-level performance combined with comfort and accessibility, making them perfect even for intensive non-competitive training.

  Another major innovation — introduced for the first time in the industry — is the ability to choose fins made with two different materials, both for the foot pockets (available in extra-soft silicone or medium-hard rubber) and for the blades (in fiberglass or carbon fiber), each offered in multiple stiffness levels. This allows every freediver to customize their equipment, finding the ideal combination according to their technical needs and level of experience.

  A distinctive feature of the SPORTECH fins is the asymmetry of the foot pockets relative to the blade’s central axis: in addition to being differentiated for right and left foot, each pocket is slightly offset inward. This unique configuration promotes a more natural and compact leg movement during kicking, enhancing hydrodynamics even with the same blade width. The result is a smoother, more efficient, and harmonious swim, ideal for both dynamic and deep freediving.

  Why Choose Them

  • ✔ Precise fit and optimal power transfer
  • ✔ Smooth, efficient, and natural movement in the water
  • ✔ Suitable for recreational, training, or intensive use
  • ✔ Fully customizable according to skill level and preferences
  • ✔ First fins on the market offering a dual material choice for both foot pockets and blades

  Ideal For

  • Dynamic freediving
  • Constant weight freediving
  • Long and continuous training sessions
  • Freedivers of all levels — beginner, intermediate, and advanced

• Size Guide

  

  Size EU	Size US	MEASURE L (toe–heel)	MEASURE W (foot width)
  35/37	5 – 6.5 (W) / 4 – 5.5 (M)	217/230 mm	80/87 mm
  37/39	6.5 – 8 (W) / 5.5 – 7 (M)	230/250 mm	85/95 mm
  39/41	8 – 10 (W) / 7 – 8.5 (M)	245/260 mm	94/105 mm
  41/43	10 – 11.5 (W) / 8.5 – 10 (M)	260/275 mm	98/108 mm
  43/45	11.5 – 13 (W) / 10 – 11.5 (M)	275/290 mm	108/120 mm