Freediving Masks

Masks for apnea and freediving with low volume. two-lens and single-lens models with a siliconeskirt, antifog lenses, and adjustable strap.

Masks for Freediving and Freediving

The mask is one of the essential pieces of equipment for freediving and freediving. Unlike snorkeling masks or scuba masks, masks designed specifically for freediving feature a low internal volume between the diver’s face and the lenses. This is a key technical principle because it means less air needs to be equalized during descent, reducing lung air consumption during equalization and making mask management easier at depth.

The range available at Deep Blue includes countless models of masks, accessories, and spare parts. The selection covers every type of use for those practicing freediving in open water, in the pool, or in competitive settings, with models suitable for both recreational use and advanced technical levels.

Types of freediving masks

Nearly all the models in this category are dual-lens masks, meaning they have two separate lenses. This configuration allows for a flatter profile and generally lower internal volume than a single-lens mask, making equalization easier during descent. There are also some single-lens models, with one panoramic lens that expands the lateral field of view, used by some freedivers for the wider visibility they provide.

Within dual-lens masks, several subcategories can be identified:

Standard low-volume masks: compact frame, silicone skirt, tempered glass lenses. They are the most common type among both recreational and advanced freedivers.
Masks with treated antifog lenses: some models (such as the C4 Falcon Antifog and Condor Antifog lines, or Salvimar Noah Antifog and Hathor Antifog) feature a lens surface treatment that reduces fogging, eliminating the need for external product treatments before each use.

How to choose a freediving mask

Choosing a freediving mask requires considering several technical and anatomical factors that are useful to evaluate before purchasing.

Anatomical fit is the main factor; there is no universal mask. The silicone skirt must seal against the face without pressure points or leaks. Since nose shape, face width, and frame profile vary from model to model, it is advisable to test the mask by placing it on the face without using the strap: if it holds by simple suction, the anatomical compatibility is good.

TAntifog treatment: lens fogging is a common issue during air-to-water transition phases. Models with integrated antifog treatment keep the lenses clear of condensation without the need for preliminary preparation with specific products.

Antifog lenses equipped with an internal film do not require any preliminary procedure; as long as the mask is clean, they work immediately. However, since these are plastic films, they must not be damaged or scratched.

Antifog lenses equipped with a Plasma treatment do not have any film, but they do require activation before use. To activate the Plasma treatment, simply immerse the mask in water for 1 minute.

Color and finish: for pool freediving or open-water freediving without hunting activity, color choice is mainly aesthetic. For those who also use the mask in close-range wildlife observation settings, dark or camouflage colors such as black, brown, and dark green are functionally different from light or glossy colors, because they reduce light refraction on the plastic structure.

Materials and technical features

The main components of a freediving mask are the skirt, the frame, the lenses, and the strap.

Silicone skirt: all models in this category are made with silicone, a material that ensures a stable seal over time, better aging resistance than natural rubber, and compatibility with different facial profiles. Unlike rubber, silicone does not stiffen in cold conditions and does not tend to degrade with prolonged UV exposure.

Tempered glass lenses: the lenses of freediving masks are made of tempered glass, which offers greater impact resistance than ordinary glass and does not produce sharp shards in the event of breakage. Treated antifog lenses integrate a surface layer that inhibits water vapor condensation, maintaining visibility underwater.

Frame: the frames of the models available are made from rigid or semi-rigid plastic materials, with profile variations that affect internal volume and overall aesthetics. In higher-end models, such as certain C4 and Cressi Quantum versions, the frames feature specific finishes or selected materials to reduce weight and improve aesthetics.

Adjustable straps: all models available are equipped with a strap and adjustment system, made from silicone or rubber. The quality and adjustability of the strap affect mask stability during deep descents. In some cases, such as with Salvimar, Cressi, Mares, C4, and other models, the replacement strap is available separately as a spare part.

Anti-fog treatment: pre-cleaner and antifog for standard masks

Masks with lenses without integrated antifog treatment tend to fog for a precise technical reason: during the molding of the silicone skirt, manufacturers add silicone oils to the raw material to facilitate processing. These oils gradually migrate toward the glass lenses, depositing a thin film that alters surface tension and causes fogging. Water, saliva, and generic products do not reliably remove silicone oils. The solution requires two specific products used in sequence.

Pre-cleaner (Cleaner) is a patented degreaser formulated to permanently remove silicone oils from the lenses without damaging the silicone or plastic parts of the mask. It should be sprayed onto dry lenses, rubbed vigorously for 4–5 minutes, left to work for 10 minutes, and then rinsed. The cycle should be repeated 3–4 times. This treatment is performed once on a new mask, not before every session. It removes the silicone oils that cause fogging.

Once contaminants have been removed, before each use in the water it is recommended to apply an Antifog product in spray or gel form. It is sprayed onto the inner surface of the lenses, left to work for 2 minutes, and then rinsed. This ensures that masks equipped with standard lenses do not fog.

Practical use

Open-water freediving and freediving competitions (static, dynamic, constant weight): freediving sessions and competitions in the open sea, lakes, or inland waters require masks with low internal volume and a stable seal during vertical descents, regardless of the depth reached. The choice of model depends on individual preferences in terms of field of view, anatomical fit, and comfort during extended breath-holds.

Pool training: In these settings, antifog treatment becomes particularly useful due to the temperature difference between pool water and the outside air.

Available brands

The Deep Blue catalog for this category includes masks from various brands specializing in freediving and underwater activities in general.

C4 Carbon: this is the brand with the widest range in this category. The range includes the Condor (antifog lenses), one of the most appreciated models of recent years, as well as models such as Falcon, Martian, and Plasma. It also produces the Mask Box as a dedicated accessory.

Salvimar: offers a broad selection with distinct lines: the Noah series (available in standard or antifog versions and in different colors), the Hathor, the Mimic, and the Neo (single-lens).

Mares: is available with the X-Tream, X-Free, Viper, and Samurai X models. A range of low-volume dual-lens masks positioned in a mid-range price segment.

Cressi: offers the Quantum, Nano, and Calibro. models. Cressi is one of the best-known brands in the Italian underwater equipment sector, with products distributed internationally.

Beuchat is available with the Maxlux S and Shark models, a historic French brand in the underwater sector with established international distribution.

Sigal Sub offers the X-Wide and Minima models, with features respectively oriented toward a wider field of view and an extremely compact profile.

H Dessault is available with two models in this category range, a brand whose production is focused on technical equipment for freediving and freediving.

Cetma is represented by the Shark Black model, with an essential low-volume construction. A brand specializing in high-quality technical equipment.

Conclusion

The selection in this category includes more than 40 models from nine specialized brands, organized by lens type, optical treatment, and color. The relevant technical parameters when choosing—low internal volume, silicone skirt quality, presence of antifog treatment, anatomical compatibility—are present to varying degrees across the different models. An informed choice comes from analyzing these factors in relation to your usage habits, facial morphology, and frequency of freediving sessions. The availability of accessories such as replacement straps, mask storage boxes, and lens treatment products completes the offering for those who need to maintain or protect their equipment.

Freediving Masks

Masks for Freediving and Freediving

Types of freediving masks

How to choose a freediving mask

Materials and technical features

Anti-fog treatment: pre-cleaner and antifog for standard masks

Practical use

Available brands

Conclusion

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