10 Tips to prevent your Snow Goggles from fogging up
Fog on your lenses and inside of your snow goggles are the most annoying thing that can happend. But luckily there are ways to reduce the fog up inside your snow goggle! This blog will give you 10 simple tips to prevent your goggles from fogging up.
Here's a quick summary of our 10 tips:
- Anti-fog coating
- Double lenses
- Foam backing
- No or a breathable buff/gaiter
- Keep moving
- Store dry
- Cleaning after the day
- Keep your goggles on
- Reserve lens
1. Anti-fog coating
This might seem the most logic option there is, and luckily a lot of snow goggles are treated with an anti-fog coating.
What does an anti-fog layer do?
The anti-fog coating is a layer on the inside lens of your snow goggle that will prevent water droplets from forming on your lens. Those droplets will look like what we call fogging up of the lens. Instead the water on the lens becomes a film of water on the lens, which will appear less visible than the droplets.
What anti-fog layers are there?
There are multiple types of anti-fog coatings, there are anti fog films, surfactants and hydrophilic coatings.
Anti-fog films are most commonly used for snow goggles, where a lens is covered with a transparant film that lowers surface tension and formation of water droplets. These films have a more permanent effect than other treatments.
Surfactants are surface layers that bond with water and form a sealed layer so that there will be no water droplets. Examples of surfactants are rubbing shampoo or soap on your lens and wiping it off without rinsing.
Hydrophilic coatings are layers that attract water and dissolve into water so that the water droplets become a film of water instead. These coatings can be applied easily by a spray on the lenses, but on the downside won't last really long.
Did you know anti-fog was developed by NASA?
Anti-fog treatments we're first developed by NASA during their Project Gemini, since then the treatments are commonly used on glass or plastic surfaces for optical use. Examples where you find anti-fog treatments most are: lenses, mirrors, glasses, binoculars, camera lenses and goggles.
2. Double lenses
Double lenses are the second most effective way to eliminate the fogging up of your snow goggle lens. A lot of snow goggles already have a double layer lens, but why is it so effective?
Why is anti-fog prevented by a double lens?
Fog are actually small droplets of water forming on a surface that bend light and limit the sight. The proces is called condensation, where moisture attaches to a surface and becomes fog.
Condensation appears faster and more intense on a surface that has a bigger temperature difference between sides. Ever noticed the ice crystals on your window during winter? By adding an extra lens, the temperature difference is reduced and fog will less likely form on the lens.
Ventilation is the third most effective way to prevent fog from forming on your lens. Most goggles have built in ventilation, some even have hand operated ventilation shafts.
Why is ventilation reducing fog up in a lens?
Simply said, ventilation is reducing the inside temperature of the goggle. By reducing the temperature inside the goggle, the difference between inside and outside the goggle are smaller. Which will lead to a reduced amount of fog building up on the lens.
What is the best ventilation for snow goggles?
The best performing ventilation shafts will prevent snow from entering in the goggle, which brings a lot of moisture inside. They will also have ventilation on the upper and the bottom side of the goggle so that the air can flow through. And last but not least, a good porous filter will help catch moisture and prevent it from entering the goggles.
4. Foam backing
Next up is the foam backing, many will wonder why it is important and we will explain.
Does foam backing reduce moister in snow goggles?
Yes, the right foam will reduce moisture from getting into the goggles. A good foam is comfortable and has a full perimeter contact with your face. No gaps where moisture can enter the goggle and fog up on the lens.
Does multiple layer foam help against moisture?
It certainly will as the foams will likely have a better function. For example our Slopesters triple layer foam consist out of a top layer that is comfortable and soft to the face. The second layer is a compression foam so that it will have full perimeter contact to your face. The last foam is a foam with high stretch resistance so that the foam won't come loose from the frame and form gaps.
5. Use no or a breathable buff/gaiter
Many people use a buff or gaiter to warm their neck and cover it over their mouth and nose. The hot and moisture rich air your breathing are sometimes blown into your goggles and end up fogging up your lenses.
It is advisable to use a breathable fabric buff or gaiter so that the moister won't result into a fog-up of your lenses.
6. Keep moving
This one is simple and you may have experienced it sometimes. When your skiing there is a lot of air flowing through your ventilation, once you stop moving your lens will start to fog up. This means there is too much fog inside the goggle and the lens will keep fogging up every time you stop. Advise is to cry the goggle or keep moving!
7. Store your goggles dry
One simple and effective way to reduce moisture is to let your goggles dry for some time after use and store them in a dry space. Do not blow them dry with a hot air dryer as this might destroy anti-fog coatings and worsen the effect. Letting it sit at room temperature over night should be enough to dry.
8. Clean your lens after a day of skiing
Simple but effective, keeping your snow goggles clean or cleaning them after use and letting them dry over the night will have a great effect. No sticky fingers or other sight blocking pollution will stay.
Don't clean your anti-fog layer with water or soap, it's best to wipe them dry with a soft cloth. An example of a soft cloth are the storage pouches that come with most of the snow goggles.
9. Keep your goggles on your head
When you enter the slopes on the morning and put on your goggles, there will be no moisture inside. Putting it off and placing it on your helmet will increase moisture as the moisture on the helmet will now freely enter the goggle and foam. Advice is to do this as less as possible to keep the moisture out as long as possible.
10. Reserve lenses
This might be a more expensive option, but is definitely one of the best options there is. Having an extra lens means a fresh new coating and a dry start all over again. The dry lens will take some time to get fogged-up and is an instant improvement.
Most people that have a spare lens will use one for the morning and use the second one after lunchtime.