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Fathom Blue, which the FRA01-C is based upon, is a marvel of mission-specific engineering.
It’s a powerful long-blade full-foot fin that is explicitly designed and built for free diving – especially spearfishing and underwater photography when tank bubbles would alarm sealife. Fathom Blue fins are also ideal for apnea competitions and even snorkeling.
The FRA01-C takes Fathom Blue to the next depth.
Incorporating all the features of Fathom Blue, its directional carbon blade ensures the unheard-of thrust that only composite fibers can deliver. Its interchangeable blade is very reactive, and purpose-built for advanced free diving and spearfishing.
Carbon design provides maximum propulsion through the leg-kick, and optimum return of the blade. Stiffness is from 20 and 30. FRA01-C’s foot pocket is very comfortable, constructed of a composite – soft around the foot, and rigid along the sides and traction surfaces. Ample fittings allows for neoprene socks. But with or without, FRA01-C provides plenty of efficient kicking power and is the ultimate in a free diving, spearfishing fin.
Sold separately: The foot pocket is made from 100% rubber that may seem “low-tech,” but in this case, is not. IST is renowned for the high quality of our rubber, and the high-end expensive rubber used in the Fathom Blue offers multiple densities to strategically provide some areas with supple softness for comfort, such as the foot pocket, and others with rigidity for maximum control, durability and spring.
Net result: Fathom Blue’s foot pocket is able to produce a spring-like effect when finning, yet its sole is rigid and efficient.
Stiffness: 20, 30
Blade dimension: 22cm x 60cm (8.5” x 24”)