Fin keepers – How to use for freediving and what benefits they provide
Fin keepers are incredibly useful yet often overlooked accessories that can make your freediving sessions more comfortable by addressing the issue of loose foot pockets. This article explores the benefits of using rubber fin straps and features the best options available.
Why do you need fin keepers?
Using fin keepers helps secure your feet in the fins, ensuring you won’t kick out of them. These affordable rubber straps offer a simple solution for oversized or loose fins while improving performance by optimizing energy transfer.
Even if you have perfectly fitting freediving fins, seasonal changes in water temperature may require you to adjust the thickness of your booties. Divers often encounter loose foot pockets when using thinner socks or no socks at all.

Diving with fins that are too large not only causes discomfort (reducing the power of your kicks) but can also lead to dangerous situations, such as losing your fins in strong currents or challenging conditions. Instead of purchasing multiple fins in different sizes, a pair of fin keepers can compensate for the gap in your foot pockets.
Another common issue is finding fins that are the right length but too wide. While some manufacturers offer freediving fins designed for narrow feet, not everyone can access them. Rubber fin grippers provide an easy way to achieve a secure fit.
Benefits of using fin keepers
- Secure loose fins
- Prevent rubbing and sores
- Allow flexibility in sizing
- Ensure fins stay on in rough water
- Provide better energy transfer
- Increase performance
- Reduce noise and vibration
As you can see, these simple and affordable accessories solve various problems related to fins, making them a worthwhile investment.
Tip: check out our how to choose fins for freediving guide for tips on how to choose a good fitting model!
How to use fin keepers?
Fin keepers are technically rubber straps that are very easy to use. Put on your socks and fins as you normally would, then place the keeper over your foot and around the heel part of the foot pocket. Adjust it until you achieve a tight yet comfortable fit.

The best 3 fin keepers
Riffe
Riffe fin straps are made of high-quality Japanese rubber, ensuring durability and a secure fit. If you struggle with oversized foot pockets, these straps can instantly improve your dives by enhancing your kicks and making underwater activities easier. This small but essential piece of equipment is a must-have!
Pros
- Tight-fitting rubber with just enough stretch to fit
- Durable and long-lasting quality
Cons
- Limited color options
- No clear sizing information provided
Overall, the Riffe Fin Keepers are a great option if you’re looking for a reliable solution to keep your fins secure during underwater activities.
Mako
The Mako fin straps kit includes two durable silicone straps designed for use with full-foot fins. Simply place them over the foot pocket to enjoy a snug fit. These straps are versatile and beneficial for freediving, snorkeling, scuba diving, and even surfing.
Pros
- More stretch than rubber and are considered more comfortable and gentler on the skin
- Designed to save energy during your dive
- Useful when you wish to dive without socks
Cons
- Sizing can be a bit tricky, so make sure to follow the size chart carefully
- It can slip off during dives if not fitted properly
Mako fin keepers are a popular choice among competitive freedivers, instructors, and spearfishers. The flexible silicone material enhances comfort and ensures a secure fit, helping you conserve energy underwater.
Scuba Choice
Scuba Choice, a leading dive gear manufacturer, offers reliable fin straps suitable for snorkelers, divers, and freedivers. These stretchy yet snug-fitting bands will keep your fins securely in place for a comfortable underwater experience. For added visibility, Scuba Choice fin keepers are available in yellow.
Pros
- Tight-fitting rubber
- Different colors
- Easy install
- Excellent energy transfer
Cons
- Choosing the right size can be tricky, make sure to follow the size chart carefully
Buying Guide
When choosing fin keepers, consider the following factors to ensure you select the best product for your needs:
Material
Fin keepers are typically made of either rubber or silicone. Rubber fin straps are more durable and long-lasting, while silicone fin grippers are softer and more comfortable. Choose the material that aligns with your priorities.
Size
Fin keepers come in various sizes to accommodate different types of fins (usually S-M-L-XL). Ensure the straps you select are compatible with your fins for a secure fit.
Color
While not a functional feature, the color of your fin keepers can impact visibility and style. Choose a color that suits your preferences.
Price
Fin keepers are generally affordable, with prices ranging from $10 to $20. Consider your budget while ensuring quality and durability.
By taking these factors into account, you can find the perfect pair of fin keepers to enhance your diving experience.
Key Takeaway
Fin keepers are essential yet inexpensive accessories that can significantly enhance your freediving experience. By addressing issues like loose foot pockets, discomfort, and energy loss, they provide a simple solution for divers of all levels. Whether you’re looking for rubber fin straps for durability or silicone grippers for comfort, investing in the right pair can make your underwater adventures safer and more enjoyable. Choose wisely and dive with confidence!
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