Mares Fins Size Chart
Open Heel Fins
Full Foot Fins
Razor / Razor Pro Freediving Foot Pockets
| Foot Pocket Size | EU Shoe Size | US Shoe Size |
|---|---|---|
| 039 | 39/40 | 7/8 |
| 041 | 41/42 | 8.5/9.5 |
| 043 | 43/44 | 10/11 |
| 045 | 45/46 | 11.5/12.5 |
| 047 | 47/48 | 13/14 |
Razor foot pockets are designed to be worn with a 3mm neoprene sock.
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Description
Description
The Mares AVANTI 4X fins represent the evolution of the iconic Avanti Quattro +, engineered for scuba diving with a focus on propulsion, control, and all-day comfort. Their sleek, modern design is tailored to pair with standard diving gear while delivering reliable performance across open-water and reef sessions.
Dual-material construction optimizes the foot pocket and blade integration for a secure, responsive fit. The 4-channel blade system generates powerful thrust while reducing fatigue during longer dives. Stabilizing side ribs with an over-molded finish blend function with style, and the bungee fin strap with an anatomical heel pad provides easy adjustment and a secure hold. Available in sizes XS to XL to accommodate a wide range of divers and gear setups. A reusable quick-dry mesh bag adds eco-friendly packaging for easy transport and storage.
Features
Features
- Successor to the Avanti Quattro + – enhanced performance and comfort
- Dual-material construction – optimized foot pocket and blade integration
- 4-channel blade system – generates powerful thrust and reduces fatigue
- Stabilizing side ribs with stylish over-molding – blends function with aesthetics
- Bungee fin strap with anatomical heel pad – easy fit and secure hold
- Available in sizes from XS to XL – accommodates a wide range of divers
- Reusable quick-dry mesh bag – eco-friendly packaging for easy transport and storage
Payment & Security
Payment methods
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WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
Frequently Asked Questions
What is the difference between open-heel and full-foot fins?
Open-heel fins have an adjustable heel strap and are worn with dive boots, which protect your feet on shore entries and add warmth. Full-foot fins slip on like a shoe against bare skin or a thin sock, and are typically lighter and easier to pack. Most scuba divers choose open-heel fins with boots, while full-foot fins suit warm water, snorkeling, and pool use.
How should scuba fins fit?
Open-heel fins should be sized around the boots you will actually wear, snug with the strap set so your heel stays seated and your foot does not slide forward in the pocket. Full-foot fins should fit like a firm shoe, with no heel lift, no pinched toes, and no gap that lets water pump in and out. Too loose causes heel blisters and lost fins in current, and too tight causes foot cramps.
Should I buy dive boots before fins?
Choose your boots first and size open-heel fins around them, because sole thickness changes the foot-pocket size you need. A thin warm-water boot and a thick cold-water boot with a rugged sole can easily be a fin size apart. If you already own fins, bring them along when you buy boots so you can check the combination.
Are spring straps worth it?
Spring straps replace the adjustable rubber strap with a stainless spring that stretches on and off, so there is nothing to buckle with cold or gloved hands and no rubber strap to perish and snap mid-dive. They hold constant tension, which many divers find more comfortable and consistent. They are sized rather than adjustable, so match the length to your foot pocket and the boots you dive.
What are the best fins for travel?
For travel, length and weight matter most, so shorter blades and travel-specific open-heel or full-foot models pack more easily and save baggage allowance. Some fins have removable blades or compact foot pockets designed for luggage. Pack fins along the outside walls of your bag, where they also act as protection for softer gear.
What is the difference between paddle and split fins?
Paddle fins use a solid blade that transfers power directly, which many divers prefer for precision, control in current, and non-flutter kicks such as the frog kick. Split fins have a slit down the blade that lets water pass through, which generally makes flutter kicking easier on the legs but gives up some control and works less well with other kick styles. Neither is inherently better, so let your kick style, leg strength, and conditions decide, and try both if you get the chance.
How do I care for dive fins?
Rinse them in fresh water after each dive day, paying attention to buckles, springs, and strap channels where salt collects, and dry them out of direct sunlight. Store them flat or hanging from the foot pocket rather than standing on the blade tips, which can take a permanent bend. Check straps, buckles, and any screws before every trip, since a failed buckle is the most common fin problem.
