Choosing Bifin Stiffness

Soft: Suitable for all women, for athletes with excellent straight-leg bifin technique, and for men who want to use these fins for training and performance. 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: Can be suitable for those who rely more on the knee-kicking technique (stronger front kick due to more bent knees) and also for stronger males who use the straight-leg bifin technique. Can also be suitable for strong males who make multiple shallow dives (e.g. fun diving, spearfishing, underwater photography, and safety freediving).

Hard: Can be suitable for very strong and heavy men who dive to mid-range depths who need to overcome resistance (e.g. spearfishers diving in currents). More suitable for the knee-kicking technique.