Mares Instinct Fins
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Fin Size Choice


Product Description

Mares Instinct Fins

Tapered tracks and pocket arms assist in creating an ideal parabolic curve in this thermo blade which is the engine for the high quality power and drive found in this sweet price point fin from Mares. The fixed footpocket is a blend of soft and rigid compounds creating a comfortable pocket while providing above average power transfer, even under duress or sprints.


  • Fixed foot pocket accomodates medium to medium wide foot shapes
  • Thermo blade with progressive trackes for ideal parabolic curve
  • Tall fin arms assist the blades curve and channel water down the blade

Size selection tips:

  • Long bladed fins should be worn with neoprene sox to avoid rub or blisters during long periods of use.
  • Typical with all freediving fins, the pockets will not stretch or "wear-in" to your foot shape, please use the size guide below to select the right size. A slightly larger fit is better than being too tight.

Size Chart (guide):

Mares INSTINCT size chart (guide).
The way this chart works:   Your shoe size  +  3mm Sox   Foot-Pocket Size
Shoe size (Aust/UK)
Shoe size (EUR)
Shoe size (US)
3mm Neoprene Sox
Foot-Pocket Size
5 - 6.5
6 - 7.5
40/41 (6.5-7.5)
7 - 8
8 - 9
42/43 (8-9)
8 - 9.5
9 - 10.5
44/45 (9.5-10.5)
10 - 12
11 - 12
46/47 (11-12)

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