FAQ Produt information
SWIMMING GOGGLES
What are the benefits of wearing swimming goggles?
Protecting Your Eyes
Swimming goggles help shield your eyes from chlorine in pools, saltwater, and invisible impurities. By reducing direct exposure, they can prevent redness, irritation, and discomfort.
Better Visibility Underwater
With goggles, you are able to see more clearly below the surface. This makes it easier to understand your surroundings, stay on course, and avoid bumping into walls or other swimmers.
Improved Focus While Swimming
Without worrying about stinging or blurry eyes, you can concentrate more on your swimming technique and breathing. This often leads to smoother and more efficient movement in the water.
Greater Comfort During Long Sessions
Goggles help keep your eyes from drying out or becoming tired, allowing you to swim longer and more comfortably. This is especially useful for people who swim regularly.
Increased Safety and Confidence
Clear vision reduces anxiety in the water and helps you move calmly and safely. This is particularly helpful for beginners, children, and people swimming outdoors.
Protection from Sunlight Outdoors
Swimming goggles are designed to block ultraviolet rays, helping to reduce eye strain and damage when swimming under direct sunlight.
What are the differences between racing and training goggles?
  1. Purpose and Design Philosophy
    Racing goggles are built for maximum speed and hydrodynamics during competitions. Every design choice focuses on reducing water resistance and distraction over short periods. Training goggles are designed for comfort, durability, and protection during long, repeated swim sessions. Performance matters, but not at the expense of eye comfort or longevity.

  2. Fit and Profile
    Racing Goggles
    Very low profile (sit close to the eyes), Smaller lenses reduce water drag, Often use thin gaskets or no gaskets at all, Fit is tight and precise

    Training Goggles
    Larger lenses with more space around the eyes, Thicker, softer gaskets, Designed to seal comfortably, even if worn for an hour or more

  3. Strap and Adjustment System
    Racing Goggles
    Thin, lightweight straps, Often basic or manual nose bridge adjustment, Designed to stay secure in dives and fast turns

    Training Goggles
    Thicker, more elastic straps, Easy adjustment systems, Comfort and stability prioritized over minimal weight
How to find perfect swimming goggle fit?
We recommend that when trying a pair of goggles on you follow the instructions below.
  1. Open eyes wide
  2. Place goggles over eyes without securing the strap
  3. Relax face and release hold
If the goggles stay in place for a few seconds you have the correct size; if not then the goggles are not fit your face.

OR

  1. Position the goggles into the eye sockets to determine if the goggles are comfortable. You should feel a slight suction.
  2. Stretch the head strap over the back of the head to rest at a 45 degree angle on the crown of the head. Adjust the strap so the goggles are a firm fit. Tightening straps does not always prevent water leaking.
  3. Ensure the nose bridge is adjusted correctly. Individual size nose bridges are ideal for difficult to fit faces i.e. large noses, wide faces, and high nose bridges.
What is premium anti-fog (PAF)?
"Premium anti-fog" is crowned with a coat that enhances anti-fog performance that is even higher than our standard anti-fog coating. SWANS swimming goggles with "premium anti-fog" which use hydrophilic anti-fog technology with increased hydrophilic component is more durable.
What are MIT lenses?
MIT means Mirror Insert Technology. By processing the mirror coat, which is originally processed on the surface of the lens, between the lenses, it prevents the mirror coat from peeling off even if the lens surface is scratched.
When is polarized lens useful?
It is suitable for use in open water held at the sea or lake, outdoor pools in fine weather, indoor pools with bright lightings etc. You can use it comfortably because it suppresses the light reflected on the water surface and ensures clear visibility.
When are swimming goggles with photochromic function useful?
It is useful in environment such as open water and outdoor pools where the weather changes.
What should I do when there is a water leak from my swimming goggles?
You may need to adjust the nose strap or head strap. Without wearing the head strap on your head, put the eyecup against your face and check if it feels like it is sticking to your face. If it does not stick to face and come off immediately, please refer to the follow method and adjust it once.

  • Adjust the tightness of the head strap but be careful not to make it too tight
  • Change the size of the nose strap
  • If the cushion is designed to be removed, check that the cushion is attached correctly
How do I choose swimming goggles?
You may use below questions to guide you for the suitable swimming goggles:

  1. Are you looking for adult goggles or junior goggles?
  2. Do you swim for leisure or professional training? If you're planning on being active in the pool or participating in triathlons, it’s important to choose a pair that offers good peripheral vision and a secure seal around the eyes. For recreational swimming and snorkelling, look for wider frames with adjustable straps that lay flat against your eyes.
  3. Are you short-sighted/far-sighted that you need lenses to accommodate such?
  4. Do you prefer clear or tinted lenses?
  5. Do you prefer lenses with premium anti-fog technology?
  6. Do you prefer mirrored or polarised lenses?
  7. Do you need wider lenses for enhanced peripheral vision? Curved lenses for increased performance and enhanced wide view to help ensure you can focus on your swim.
How do I choose prescription swimming goggles?
Prescription swimming goggles are sold with individual lenses for each eye, and there is no distinction between left and right lenses. Accessories such as nose strap and head straps are sold separately.
If the prescription strength is the same for both eyes, you may also choose ready‑made prescription swimming goggles. In general, we recommend selecting a prescription that is slightly weaker than your regular eyeglasses.
SUNGLASSES
How much UV rays can be blocked by SWANS sunglasses?
Ultraviolet rays can damage not only the skin but also the eyes. It has been pointed out the prolonged exposure to strong sunlight not only causes painful inflammation, but also contributes to eye damages. All the lenses used by SWANS (except some Yamamoto products for special purposes) block more than 99.9% of harmful UV rays regardless of the lens color.
Does the ability to cut ultraviolet rays have a lifespan?
The UV-absorbing material contained in the lens does not deteriorate over time. However, it is affected by damage to lens itself, such as scratches and breakage.
What do the polarized lenses do?
Polarized lenses have a special function that effectively cuts the glare of reflected light (polarized light) and reflected light. 
What is ultra lens?
"ULTRA LENS" is a lens with a function that enhances visibility by emphasizing a special color gamut according to the purpose and application, so that the object can be clearly seen. Since the color gamut that should be emphasized varies depending on the sports and environment, SWANS is optimizing them through joint research with professional athletes for each category.
What are color-changing photochromic lenses?
A photochromic lens is a special lens that changes its color (darkness) depending on the intensity of sunlight (amount of ultraviolet rays) automatically in all weather conditions.
What are the differences between polarized lenses, photochromic lenses and mirrored lenses for sunglasses?
Polarized Lenses
Polarized lenses reduce glare from the sun and reflections from water, making them ideal for athletes who spend time outdoors. One drawback is that polarized lenses may interfere with certain screens, such as those on smartphones or computer monitors, which can make them impractical for sports that require viewing these displays.

Photochromic Lenses
Photochromic lenses automatically adjust to the amount of UV radiation, darkening in high‑UV conditions and becoming lighter in lower‑UV environments. The main benefit of this type of lens is that it provides excellent visibility in both cloudy and sunny conditions.

Mirrored Lenses
Mirrored lenses are ideal for athletes who want maximum protection from bright light during sports. They also make it difficult for opponents to see your eyes, which can be advantageous during strategic maneuvers.
Do you have glasses that can be worn with prescription glasses?
There are options available, including overglasses and clip‑on lenses, that are designed to be worn over prescription eyeglasses.
Can I order prescription sunglasses?
We do not offer prescription lenses for sunglasses. Please purchase the optic frames and bring them to eye specialist for prescription lenses.
How do I choose sunglasses?
Are you looking for sunglasses primarily for sports or leisure use?
If you plan to use them for sports, what kind of sport do you play? We offer sunglasses specifically designed for different sports in our collection.
  1. Do you prefer lightweight sunglasses?
    If you are interested in a lightweight option, we recommend the Airless series.
  2. Do you have nearsightedness or farsightedness and require prescription lenses?
    If so, please choose frames that are compatible with prescription lenses.
  3. Do you prefer clear lenses or tinted lenses?
    We recommend clear lenses for early morning or nighttime use, and tinted lenses for daytime use.
  4. Do you need photochromic lenses?
    If you plan to wear your sunglasses throughout the day, photochromic lenses are an excellent choice.
REPAIR & CARE
How to take care of my swimming goggles?
To preserve the life of your goggles and keep them in good condition we recommend you follow these rules:
  • Spend a minute cleaning the lenses after every swim.
  • By gently washing them in clean running water you can remove any chlorine or harmful chemicals that will shorten their lifespan.
  • Don’t ever use soap or detergent though as they are a natural enemy of the anti-fog coating.
  • If you cannot remove chlorine or harmful chemicals, sebum stains, please drop one or two drops of neutral detergent to a tub of water and later to clean. Please do not scratch or rub the inside of the lens.
  • After washing, leave your goggles to air-dry shade in a flat position. If they are left wet in your kit bag they’ll most likely grow bacteria and mould.
  • Do not leave goggles in direct sunlight for prolonged periods, this may affect the durability of the straps.
How to take care of my sunglasses?
Please refer the instruction manual included in your purchase. Simply reach out to our Customer Care Team via contact form or swans-japan@yamamoto-kogaku.co.jp
Do you repair my SWANS item? What information I should provide?
SWANS is solely responsible for the quality of products sold on this global website. Customers who have purchased SWANS’ products from SWANS’s distributors, retailers, or resellers of any sort should contact the original sellers for direct assistance with any quality issues or warranty claims.
If you have a SWANS item that is purchased from this global site and needs repair, please provide us with the following information first contact form or swans-japan@yamamoto-kogaku.co.jp
  • Email address used to place the order
  • Product photos of the model and issues
How long does it take for repair and what would be the costs?
The length of time for the repair process and the cost of repairs varies depending on the product and the specific issue. Here is some general information on repair time and costs:
Repair time: If the repair parts are available, it usually takes about two to three weeks to complete the repair process. However, the repair time may vary depending on the specific product and the extent of the repairs needed.
Repair costs: The cost of repairs also varies depending on the product and the specific issue. Please let us know which part and which model you want to repair, and we can provide you with an estimate for the cost of repairs.
OTHERS
Can you help authenticate the SWANS product that I have bought from another online retailer?
  • To assist us determining the authenticity via pictures, please provide us with the information of where you have bought the product.
  • If you can send the product back to us physically then we can confirm. The shipping costs of both ways will be covered by the customer.