Precise moves, less silt
Exceptional manoeuvrability allows small, accurate movements in confined spaces, reducing disturbance of sand and silt. Perfect for frog-kicking.
RK4
A compact, wide-blade technical fin for frog kicks and tight spaces
RK4 is Apeks' modern-style technical fin, with a compact, wide blade that helps you conserve energy. Apeks designed it for outstanding manoeuvrability in confined spaces and overhead environments, with small, accurate movements that keep sand and silt down, while still performing in open water. It works with wetsuits and drysuits and is made for frog-kicking and back-finning.
Ask for the price on LINE
Not chosen yet: Colour, Size · choose first, or just ask in the chat
- 1Tap Order on LINE: our chat opens with your model, colour and size typed in. Just send.
- 2We check stock and confirm the total with shipping in the chat.
- 3Pay by transfer or PromptPay, send the slip, and we ship with a tracking number.
- Free shipping in Thailand from ฿2,000
- Authorised dealer · brand warranty
- Size exchange within 7 days
Highlights
Power on the upstroke and downstroke
Apeks designed it for a more energy-efficient dive, with optimum performance on both the upstroke and the downstroke.
Stainless-steel spring straps, 2 settings
Two adjustment points make switching between wetsuit and drysuit settings quick and easy, and the fins go on and off easily even in gloves.
One-piece rubber, integrated steel buckles
One-piece rubber construction is durable and easy to recycle, and the tough integrated stainless-steel buckles reduce snag hazards.
Who it is for
Great for
- Confined spaces or overhead environments where precise control matters
- Divers practising frog kicks or back-finning who want to keep the silt down
- Divers who switch between wetsuit and drysuit: two strap settings
Maybe not for
- New divers after a first fin: Apeks builds RK4 as a technical fin. If you are just starting, try GULL MEW (a full-foot fin), which GULL calls easy to use at any level, or ask us on LINE
Size guide
Not sure about the size?
- Stand on paper and measure from heel to the tip of your longest toe.
- For strap fins, go by your boot size, not your bare foot.
- Between two sizes? Ask us before you order.
Specifications
- Type
- Technical fin, one-piece rubber construction
- Straps
- Stainless-steel spring straps, 2 adjustment points for wetsuit/drysuit settings
- Buckles
- Integrated stainless-steel buckles
- Use
- Precise movements in confined spaces; suited to frog-kicking
FAQ
How do I pick a size?
RK4 comes in S, M, L and XL, but Apeks' site has no size chart yet. Ask us on LINE before you order, and you can exchange sizes within 7 days if unused and never in the water (you cover shipping both ways unless we sent the wrong item or it is faulty).
Is it OK for beginners?
Apeks builds RK4 as a technical fin for precise control in tight spaces, frog kicks and back-finning, and does not say it is made for new divers. If you are just starting, GULL MEW, a full-foot fin, is the one GULL calls easy to use at any level. Still unsure? Ask us on LINE.
Which kicks is it made for?
Apeks says RK4 is perfect for frog-kicking and back-finning. It allows small, accurate movements in tight spaces with less disturbance of sand and silt, and performs on both the upstroke and the downstroke.
Does it work with a drysuit?
Yes. Apeks says it suits both wetsuits and drysuits, and the stainless-steel spring straps have two adjustment points for quick switching.
Is it hard to put on with gloves?
No. Apeks designed it to be easy to put on and take off, even when wearing gloves.
