Technical sheet

C4 Storm Diving Fins

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18 Reviews

21 Questions

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Features of C4 Storm

Product description of C4 Storm Diving Fins

Description summary

Experience Italian craftsmanship with the C4 Storm fins, perfect for novices and experienced divers in shallow waters (0-18m). These fins feature a soft, reactive, and durable technopolymer blade, 10cm shorter for enhanced agility. The revolutionary 250 footpocket is exceptionally lightweight and comfortable, using a special polymer to maximize energy transfer for a highly efficient kick. Water rails prevent drift, ensuring superior performance and control. 100% Made in Italy for your next underwater adventure

Manufactured entirely at C4 plant in Italy, STORM fins are made by over- molding a technopolymer blade with 250 footpockets.

These fins are ideal not only for diving novices but also for experienced spearos and freedivers who spearfish in shallow waters (0-18mt).

Storm fins feature a comfortable foot pocket, a soft and reactive blade but 10 cm shorter than the standard length featured on spearfishing fins.

FOOTPOCKETS 250.

STORM fins are equipped with the new 250 footpockets.

Thanks to the use of a TPE 75 ShA polymer, the energy transmission of the 250 footpocket to the blade in increased, thus obtaining highly efficient fins.

The study of the geometries has allowed us to obtain minimum thicknesses, allowing the weight of the 250 liner in size 41/42 to be reduced to just 250 grams.

FIN BLADE.

We have sourced and tested a specific polymer to obtain a soft blade with high elastic return and strong resistance to breakage.

The presence of water rails in the final part of the blade prevents the fin from drifting during the kick, thus improving performance.

100% MADE IN ITALY.

All C4 carbon fiber blades have always been entirely manufactured in our production plant in Italy.

Starting this year, a new plastic injection department has been added at C4 plant and this is where the 250 footpockets and STORM blades are manufactured.

MB fins are a 100% MADE IN ITALY by C4.

All C4 carbon fiber blades have always been entirely manufactured in our production plant in Italy.

Starting this year, a new plastic injection department has been added at C4 plant and this is where the 250 footpockets are also manufactured.

Specifications

Manual

Size chart

Technical specifications of C4 Storm

Features of C4 Storm

Strap Closed foot pocket

Strap

Closed foot pocket

Color Black

Color

Black

Age Adult

Age

Adult

Materials Fiber

Materials

Fiber

Recommended Use Spear Fishing

Recommended Use

Spear Fishing

Key differentiators

Crafted entirely in Italy for quality and performance.

Designed with a soft, reactive, and durable blade with high elastic return.

Features the lightweight 250 footpocket, weighing only 250 grams, for enhanced comfort and energy transfer.

Integrated water rails provide improved stability and prevent fin drift during kicking.

Technopolymer blade is 10 cm shorter for increased agility in shallow waters (0-18m).

Technology in C4 Storm Diving Fins

Energy rating

Warnings

4.89 / 5

18 Reviews

What our customers are saying about C4 Storm Diving Fins

Discover comfortable, lightweight, and flexible fins perfect for snorkeling and freediving. Experience fluid finning and excellent performance with these durable plastic fins. Ideal for pool training or reef exploration, they offer good gliding and maneuverability. The soft rubber foot pocket ensures comfort, though some recommend sizing up for a better fit, especially with socks. These high-quality fins provide great value for their performance

Exceptional

2026/05/24

Diego

Absurd price-quality ratio, best fins for their price range, ideal for those who practice fishing in shallow waters

Comfortable fin and friendly customer service

2025/11/13

Judith

I wear a size 40/41 shoe and ordered the fins one size larger: 41/42, as I like to dive with socks. The fins are super comfortable. The rubber foot pocket is really soft! I'm also really surprised how quickly the delivery arrived in Germany. Five stars for that too. I had previously ordered another pair of fins, which I unfortunately had to return... The return process was also hassle-free. And the customer support is really friendly and responded within a few hours/minutes. Best regards

Comfortable

2025/07/13

Igor

Very, very comfortable fins for being made of plastic, very easy to move with the current,

Great product

2025/02/24

Carla

On the advice of the instructor, I bought these fins. Excellent product. I recommend one size larger than the one you usually use, because the foot pocket is really small.

Are ok

2025/02/11

Pee

The fins are ok.

Good product

2024/11/15

Tateos

I haven't tried them yet, but they seem very light and I imagine they will do a great job. For those who want lighter and slightly more maneuverable fins. Perfect for reefs.

C4 storm

2024/09/26

Fréd

swimming in the pool is perfect, they are not flexible, I would say medium, the fit is good for the size but if you have thin feet like me, consider wearing slippers.

I love!

2024/08/20

Aleksandra

I am delighted with the fins! They are light, quite flexible. I wear shoes in size 37, I ordered fins 38/39 and they are good for bare feet. I have a slightly wide foot and at first I thought they would rub a little, but nothing like that happens. I use them for snorkeling and freediving in cold lake waters. In my opinion, they swim lightly and efficiently.

Nice fin

2024/08/17

Amin

Light weight fin

Respect

2024/08/04

Podvox

The fins are of excellent quality, after testing them in the pool I was surprised again that they are fast as a storm, fast delivery, I will order more!

Fairly flexible fins

2024/08/02

Jean Noël

Fins met my expectations. The sails are quite flexible and allow good gliding. Satisfied with this product

Excelente

2024/07/16

Toni

Las mejores aletas de plastico , muy ligera y funcional. Espero que duren mucho tiempo

Unreliable fit

2024/04/06

Marco

The fins are very well made. Suitable for training in the pool and for fishing in shallow and medium seabed. The shoe is very ergonomic and enveloping. Unfortunately, the descriptions on the buyers' website regarding the size and fit are totally incorrect. I recommend purchasing a larger size if you want to wear them with a 2/3 mm fit. I wear size 43 and when I buy size 42/43 they are too small for me without the shoe! I had to change them.

Lightness and good tone

2024/03/29

Jean Noël

These fins have good performance. They are light, flexible, and make finning very fluid.

Great product and excellent service

2024/03/03

Corrado Carbone

Super fins and super professional delivery. Highly recommended.

First impression

2024/03/01

Pascal

They make a very solid impression. I wear shoe size 44 in everyday life. I ordered these fins in size 42/43 and they fit perfectly. I don't wear neoprene socks. I will test it soon and then edit my review and provide further information.

Surprised

2023/11/26

Marcio

Incredible product for the value.

Storm

2023/11/15

N. Gomes

Quality fins, light and positively buoyant. Shipping within the established deadline.

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Include AI Generated questions and answers

2024-01-03

John

The blades of the C4 Storm Diving Fins can be changed. or is it only a full one-piece fin that I cannot change the blade on?

Answer of CARLOS

The blades cannot be changed because it is a whole fin.

Answer of fabio

no, the blades cannot be changed, it is a unique piece.

Answer of Philipp

It is a full one-piece fin that you cannot change.

* Generated by AI based on customer and product data

2024-11-16

ARBI

Hi Sir/Madam, May i know detail size C4 Storm Diving Fins in Length x Width x Height ? thanks

Answer of Antonio

Length including shoe size 43/44 cm. 79. Maximum width 19.5 cm. Height when stretched out 12 cm.

* Generated by AI based on customer and product data

2025-06-26

Gever John

What is the stiffness of the blades? Soft or Medium?

Answer of Aleksandar

Best you can buy for that money for beginner or someone who dont intent to use it too often or seriously y. Foot pocket is comfy. Blade is not to stiff. Bought for my wife who use it maybe three times a a year. I have for myself Alchemy carbon fins but thats incomparable price or performance wise however im pretty serious about it.

Answer of ARUNAS

Stiffness is medium.

* Generated by AI based on customer and product data

2026-09-16

Generated by AI and verified

What kind of material are the C4 Storm fins made from?

Answer of Generated by AI and verified

The C4 Storm Diving Fins are constructed from a durable and reactive technopolymer. The foot pocket utilizes a specific TPE 75 ShA polymer to enhance energy transfer and efficiency.

* Generated by AI based on customer and product data

2026-09-16

Generated by AI and verified

Are the C4 Storm fins made in Italy?

Answer of Generated by AI and verified

Yes, the C4 Storm Diving Fins are 100% made in Italy. Both the blades and the foot pockets are manufactured at the C4 plant in Italy.

* Generated by AI based on customer and product data

2026-09-16

Generated by AI and verified

Do these fins have adjustable straps?

Answer of Generated by AI and verified

No, the C4 Storm fins feature a closed foot pocket design and do not have adjustable straps.

* Generated by AI based on customer and product data

2026-09-16

Generated by AI and verified

Are the C4 Storm Diving Fins worth the investment for recreational divers?

Answer of Generated by AI and verified

The C4 Storm Diving Fins offer a blend of Italian craftsmanship and advanced design, making them a valuable choice for recreational divers. Their soft, reactive technopolymer blades and lightweight foot pockets enhance performance and comfort.

* Generated by AI based on customer and product data

2026-09-16

Generated by AI and verified

What is the weight of the C4 Storm fin?

Answer of Generated by AI and verified

A single C4 Storm fin weighs 250 grams, thanks to the lightweight design of the 250 footpocket.

* Generated by AI based on customer and product data

2026-09-16

Generated by AI and verified

What are the main features of the fin blade?

Answer of Generated by AI and verified

The technopolymer blade is designed to be soft, reactive, and durable, with high elastic return and strong resistance to breakage. It also features water rails to prevent the fin from drifting sideways during kicking, which improves control and performance.

* Generated by AI based on customer and product data

2026-09-16

Generated by AI and verified

What type of foot pocket do the C4 Storm fins have?

Answer of Generated by AI and verified

These fins are equipped with the model 250 closed foot pocket, which is designed for a secure fit and efficient energy transfer without the need for adjustable straps.

* Generated by AI based on customer and product data

2026-09-16

Generated by AI and verified

What is the length of the C4 Storm Diving Fins?

Answer of Generated by AI and verified

The C4 Storm Diving Fins have a blade length of 10 cm, designed to enhance agility and control underwater.

* Generated by AI based on customer and product data

2026-09-16

Generated by AI and verified

What type of diving are the C4 Storm fins best for?

Answer of Generated by AI and verified

The C4 Storm fins are ideal for spearfishing and freediving in shallow waters, specifically recommended for depths from 0 to 18 meters. Their design is suitable for both novices and experienced divers in these conditions.

* Generated by AI based on customer and product data

2026-09-16

Generated by AI and verified

Are these fins suitable for beginners?

Answer of Generated by AI and verified

Yes, the C4 Storm fins are suitable for novices. Their design, which includes a soft and reactive blade, makes them a good choice for those new to diving or spearfishing in shallow water.

* Generated by AI based on customer and product data

2026-09-16

Generated by AI and verified

Can these fins be used for deep-water diving?

Answer of Generated by AI and verified

These fins are specifically optimized for performance in shallow waters, from 0 to 18 meters. They are not designed for deep-water diving.

* Generated by AI based on customer and product data

2026-09-16

Generated by AI and verified

How do the C4 Storm Diving Fins compare to the Cressi Pro Star Diving Fins?

Answer of Generated by AI and verified

While both fins are designed for diving, the C4 Storm Diving Fins feature a technopolymer blade and closed foot pocket for enhanced energy transfer, whereas specific details about the Cressi Pro Star Diving Fins are not available.

* Generated by AI based on customer and product data

2024-03-29

Giuseppe Di Gregorio

Good morning, I wear number 43 as my shoe size. What size should I buy considering a 3 mm fit? Many thanks in advance

Answer of Denis

One size smaller, I have a 43 with a 5 size fit, they are comfortable. But 3 yi I recommend a size smaller as they fit comfortably

Answer of Jean Noël

Hello, I wear a size 42.5 and I wear my fins with 3mm liners. I chose these fins in size 44/45 and they fit very well. Sincerely

* Generated by AI based on customer and product data

2024-04-05

Marco

I wear the 43/44 but ordering according to the size chart and the reviews on the site, I got the 42/43 but they are too small for me and I have to return them. I usually wear fins with 3mm socks. What number do you recommend? 43/44 or 44/45?

Answer of davide

Hi, I recommend 43/44, I have the same number as you

Answer of fabio

like your 43/44 fit

* Generated by AI based on customer and product data

2024-02-09

Rodrigo Silvestre

What is the individual weight of each one for number 45? Are they made of carbon?

Answer of CARLOS

They are not made of carbon. As for weight, I have 40/41 and each fin weighs approximately 600 g. For the 45 it will be a few grams (few) more in weight.

Answer of fabio

I don´t know the weight, but they are not carbon.

Answer of Philipp

I'm not sure about the weight but they are pretty light for not being made of carbon fiber.

* Generated by AI based on customer and product data

2024-12-05

Gilson

Good morning, how many cm is the fin high? 65 or less?

Answer of CARLOS

The maximum fin length for size 40/41 is 76/77 cm. The maximum blade width is approximately 19.5 cm. I recommend these fins as they have good performance.

* Generated by AI based on customer and product data

2024-05-12

Javier

What material are they made of?

Answer of marco

the fins are made of technopolymer (plastic). They are not particularly hard. Ideal for swimming pools and fishing in shallow and medium depths (0-20 metres).

* Generated by AI based on customer and product data

2024-07-28

Francisco

I am starting out in scuba diving. I would like to know if at a certain point I could replace the storm blades with more professional ones while maintaining the foot pocket. thank you so much

Answer of CARLOS

It is not possible to replace the blades because the fins are entire. For the price and performance, I recommend purchasing these fins by checking the size on the C4 website, which is given in mm, which is quite reliable.

Answer of fabio

* Generated by AI based on customer and product data

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Frequently bought together

Best sellers

Use cases

Shallow Water Spearfishing 100% Fit

These fins are explicitly recommended for spearfishing and are designed for use in shallow waters up to 18 meters. The soft, reactive blade provides the necessary propulsion for approaching fish without expending excess energy.

Recommended for spearfishing,Suitable for depths of 0-18m,Soft and reactive blade,Water rails to prevent drift

Recreational Diving for Beginners 90% Fit

Designed for novices diving in shallow waters (0-18m), these fins offer a user-friendly experience. The closed-foot design is easy to put on, and the soft blade is forgiving for those learning proper finning technique.

Perfect for novices,Shallow water suitability (0-18m),Closed foot pocket,Soft blade

Snorkeling in Calm Waters 80% Fit

The closed foot pocket offers a comfortable fit for snorkeling without dive boots. The soft, reactive blade provides efficient propulsion for exploring reefs and marine life with minimal effort.

Closed foot pocket for comfort,Soft, reactive blade,Durable technopolymer construction,Neutral buoyancy

Underwater Training and Drills 70% Fit

The durable TPE 75 ShA technopolymer construction and strong resistance to breakage make these fins a reliable choice for repeated use in training. The water rails help maintain stability and prevent lateral drift, allowing focus on technique.

Durable technopolymer material,Strong resistance to breakage,Water rails for stability,High elastic return

Best for

Ideal for Spearfishing

Specifically recommended for spearfishing, these fins offer a reactive and durable blade with water rails to prevent drift, ensuring control and reliability during the hunt.

Based on: recommended_use: Spear Fishing, Blade features: ['reactive', 'durable', 'water rails prevent drift']

Great for Shallow Water Diving

Designed for use in depths up to 18 meters, these fins are perfect for hobbyists exploring shallow reefs and coastal areas, offering a balance of performance and comfort.

Based on: water_depth_suitability: 0-18m (perfect for novices and experienced divers in shallow waters (0-18m))

Perfect for Snorkeling Explorers

With a soft, reactive blade and a comfortable closed-foot pocket, these lightweight fins provide easy propulsion for casual snorkelers exploring the water's surface.

Based on: blade_features: ['soft', 'reactive'], Foot pocket type: closed foot, Fin weight: 250 grams

Excellent for Aquatic Fitness

The high elastic return of the technopolymer blade provides efficient propulsion, making these fins a great choice for building leg strength and improving underwater fitness.

Based on: Aquatic Fitness & Wellness, Blade features: ['high elastic return'], Material: technopolymer

Benefits

FunctionalEngineered for Lasting Performance

Built to withstand the demands of frequent use, these fins feature a blade with strong resistance to breakage. The technopolymer and TPE 75 ShA polymer construction ensures long-term durability, making them a reliable choice for your underwater activities.

Material: technopolymer

Blade features: durable

strong resistance to breakage

Polymer type: TPE 75 ShA

Foot pocket polymer: TPE 75 ShA polymer

FunctionalSecure and Comfortable Fit

Experience a secure and comfortable fit with the closed foot pocket design. This feature provides excellent support for your foot and ankle, ensuring stability and comfort throughout your dive without the need for adjustable straps.

Foot pocket type: closed foot

Adjustable straps: no

FunctionalIdeal for Shallow Water Exploration

Perfect for supporting an active lifestyle, these fins are designed for use in shallow waters from 0-18 meters. Whether you're a novice or an experienced diver, they are an excellent tool for spearfishing and aquatic fitness routines.

Water depth suitability: 0-18m (perfect for novices and experienced divers in shallow waters (0-18m))

Recommended use: Spear Fishing

Ideal buyer profiles

The Spearfishing Adventurer

This diver is focused on spearfishing, often in shallow to moderate depths. They require fins that offer a balance of power, control, and durability for maneuvering near structures and reacting quickly to targets.

The C4 Storm fins are specifically recommended for spearfishing. Their soft, reactive blade provides the necessary propulsion, while the integrated water rails prevent drift, offering excellent control. The technopolymer construction and TPE 75 ShA polymer ensure durability and strong resistance to breakage, which is ideal for the demands of spearfishing.

The Occasional Diving Hobbyist

This individual enjoys diving a few times a year, typically in calm, shallow waters on vacation. They look for comfortable, easy-to-use equipment that performs reliably without needing professional-level features.

These fins are an excellent choice for hobbyists, being perfectly suited for depths of 0-18m. The closed foot pocket design offers a secure and comfortable fit without the complexity of adjustable straps. The blade's high elastic return makes kicking efficient and less tiring for occasional divers.

The Casual Snorkeling Explorer

This person enjoys exploring the surface and making short, shallow dives while snorkeling. They prioritize lightweight, comfortable fins that are easy to pack and provide enough propulsion for leisurely exploring reefs and coastlines.

Weighing only 250 grams, the C4 Storm fins are lightweight and easy to manage for snorkelers. The soft, reactive blade offers efficient propulsion without requiring excessive effort, perfect for extended time on the surface. The closed foot design is simple and comfortable for casual use in shallow waters.

Competitive features

When evaluating diving fins, it's essential to consider how a product's specific design features align with your intended use. The C4 Storm Diving Fins are positioned as a versatile option, particularly for shallow water activities. This analysis compares the C4 Storm fins against several competitors to help you determine the best fit for your underwater adventures.

Where it excels

The C4 Storm fins are explicitly designed for agility and efficiency in shallow waters (0-18m), featuring a blade that is 10cm shorter than standard spearfishing fins. This makes them particularly well-suited for novices and experienced spearfishers who operate in confined or shallow environments. These fins emphasize efficient energy transfer through their lightweight 250 footpocket, which is engineered from a special polymer. This design, combined with water rails to prevent drift, aims to provide superior control and a highly efficient kick, a feature not detailed for the other compared models.

Consider alternatives if...

The provided comparison data shows that the C4 Storm and its competitors, such as the Salvimar Nobilis and Seac Speed, are all positioned at a very similar price point. If your primary decision-making factor is finding the lowest possible cost, there are marginal differences, but no single model stands out as a significant budget option based on this data alone.

Verdict

The C4 Storm Diving Fins are an excellent choice for divers and spearfishers who primarily operate in shallow waters up to 18 meters. Their unique shorter blade design prioritizes agility and control, while the advanced footpocket technology focuses on maximizing kick efficiency. While priced similarly to competitors, their specific design for shallow-water performance and Italian craftsmanship makes them a compelling option for their target user.

Specs comparison

	C4 Storm Diving Fins	C4 Predator Diving Fins
Material	technopolymer	plastic
Buoyancy	neutral	neutral
Blade Type	paddle	paddle
Fin Weight	250 grams	250 grams

Specs vs competitors

	C4 Storm Diving Fins	Cressi Pro Star Diving Fins	Cressi Palau Diving Fins	Cressi Pluma Diving Fins
Material	technopolymer	plastic	plastic	plastic
Buoyancy	neutral	neutral	neutral	neutral
Blade Type	paddle	paddle	paddle	paddle
Foot Pocket Type	closed foot	full foot	open heel	full foot
Fin Length	10 cm	-	-	58 cm
Fin Weight	250 grams	-	500 grams	-