Having tried the RK3 some of the team have gone for the HD version (Heavy Duty) and some of us have simply gone for the RK3 (slightly lighter version). Whichever you go for they make for a FAB pair of ‘go smoother through the water’ fins!

Brilliant pair of fins!

Specifications for the RK3 so that you can compare (see the RK3 HD post) are:

Medium 982gm per fin

Blade 49cm
Foot depth 22cm
Foot width 9cm

Large 1.19kg per fin

Blade 54.5cm
Foot depth 25.5cm
Foot width 9.5cm

Super 1.27kg per fin

Blade 57cm
Foot depth 27cm
Foot width 10cm

  • based on one of the first vented rubber fins sold in North America and popular among military and professional divers.
  • Compact, and ultra-rugged for use in harsh environments.
  • Improved foot pocket with spring straps for ease of use with cold hands or thick gloves.
  • The design has been the standard gear issue fin for military, special ops, coast guard and public safety divers for decades.
  • Short wide blade provides maximum forward thrust while maintaining great manoeuvrability.
  • Vented blade design reduces resistance on the upstroke and enhances thrust on the downstroke.
  • The vents also eliminate vortexes that can occur along the back of the blade much in the same way split fins eliminate the vortex.
  • The blade material designed to hold up in the toughest environments, temperatures and abuse.
  • Two large grommet holes designed to fit most karabiners for easy storage of the fins while accessing the dive site.
  • Spring straps as standard.
  • Custom designed buckle holds spring straps in optimum position.
  • Simple push pin design allows simple replacement of springs if necessary.


  • Sizes: Medium, Regular and Super
  • Colour: Black, white, yellow.