The Apeks RK3 HD is the higher-density version of the RK3: the material makes the fin stiffer and negatively buoyant, which Apeks recommends for wetsuit diving. It keeps the oversized foot pocket and spring strap of the RK3. This listing is the black fin in size M.

Main features

• Based on one of the first vented rubber fins sold in North America, a design long issued to military, coast guard and public safety divers.
• Compact and very rugged, for harsh environments.
• Short, wide blade for strong forward thrust and good manoeuvrability.
• Vented blade that reduces resistance on the upstroke and adds thrust on the downstroke.
• Foot pocket sized for drysuit boots.
• Spring straps as standard, easy to use with cold hands or thick gloves; a push-pin design makes the springs simple to replace.
• Two large grommet holes that fit most karabiners, for carrying the fins to the dive site.

Good to know

Apeks gives no shoe-size range for the RK3 HD, because the footwear you dive in decides the fit.

Options on this listing

This page is the RK3 HD in black, size M (part number 720000M BKBK). Use the buttons to see the other options.