Swimming Goggles Mirrored Lenses B-FAST 900 Black / Red

Ref. : 8547681

Our design teams have developed these goggles for advanced swimmers looking for performance while training as well as competing

Tired of having only one size nose bridge? Thanks to their innovative system with a nose bridge that can be adjusted with precision and their compact design, these goggles offer you perfect stability.

Color: black / black / cotton white

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  • Free delivery for Decathlon brands orders above $399
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Products benefits


Swim with fog-free goggles – these swimming goggles have an anti-fog treatment.


Feel the stability thanks to the lenses’ compactness and streamlined design.


Adjust your nose bridge with precision and the double elastic on the rear

Field of vision

Benefit from a wide field of vision 135


Soft compression seals enabling the goggles to be adjusted to fit your face

Technical information


Are you looking for goggles that are tailored to fit your face, completely watertight and that do not move as you swim, dive or tumble turn?

We bring you the answer in the B-FAST goggles thanks to a nose bridge adjustment system that is simple and precise. This system lets you fine-tune the spacing of the two lenses, using either the screwdriver provided with the goggles or the built-in tool on the back buckle.


The appearance of fogging depends on several factors, the difference in temperature between the body and the water, humidity levels, etc.
Wear due to friction is one of the main causes.
If your goggles fog up, dip your lenses in the water and a protective film will reform.
After a certain amount of time it is normal for the performance of the anti-fog coating to be diminished.

We provide an anti-fog marker that reactivates an ageing anti-fog treatment and makes your goggles last longer.


The watertightness of the swimming goggles is dependent on the proper fit of the skirts with the shape of your face.
Before purchase, we advise you to do the "suction" test without the strap.
If the goggles stay on the face by themselves via slight suction, the product will be watertight during your swim. This also enables you to spot any areas of discomfort or annoyance when the model is on the face.

One-size model with precise nose bridge adjustment


These swimming goggles fit the morphology of your face without needing to be over-tightened.

Goggles that are too tight can cause discomfort, leave marks and even create water inlet holes.

It is not necessary to press against the lenses with your hands, a light suction effect is usually enough for swimming sessions without water inlet holes.

The straps ideally should rest 2-3 cm above your ears.
This position will optimise the grip and comfort of the goggles.


The colour of your goggles should be suited to your swimming location and its lighting.
If you practice outside or in a pool with harsh lighting, prioritise goggles with smoky lenses to limit the glare for greater comfort.
If, however, the pool is quite dark with low lighting, winter evenings for example, use clear lenses.
The B-FAST swimming goggles are available in different lens tints.


We recommend:
- rinsing your goggles (only if necessary) by simply dipping them in water
- avoiding directing powerful jets of water at the inner surface of the lenses.
- storing the goggles in their case after each session to prevent damage to the lenses (on the inner surface as there is an anti-fog coating and on the outer surface to prevent scratches)
- not exposing them to temperatures of over 60°C



Complies with standard: Q/BT 4734 - 2014, all Nabaiji swimming goggles protect against harmful UVA and UVB rays when used normally, regardless of the lens tint.

Looking directly at the sun is dangerous and can lead to irreversible eye damage.


B-FAST NABAIJI goggles are training and competition goggles approved by FINA (international swimming federation).


2 years

More About Product

鏡面泳鏡 B-FAST 900 暗紅色鏡片

Product concept & technology

Product Composition

Gasket 100% Thermoplastic Polyethylene Buckles 100% Polycarbonate Strap 100% Silicone Lens 100% Polycarbonate Metallic structure 100% Polyamide Screws 100% Polyoxymethylene


After use, store the goggles in their case.
Important: Do not touch the inner surface of the lenses as this could destroy the anti-fog treatment


The Nabaiji swimming goggles comply with the EPI regulation 2016/425.
Our products are tested and approved by independent laboratories.

Goggles intended for swimming at the surface

Approved By

Fabien Gilot, 2012 Olympic Champion, 2015 World Champion and NABAIJI technical partner. Fabien co-designed and approved NABAIJI B-FAST goggles during use for his training sessions and high-level swimming competitions.

Maintenance advice

Rinse in clean water after use. Dry in a dry and ventilated place..

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