Guide Contents:

		Finding a Pair of Goggles
		Caring for your Goggles
		Fogging
		Why Do Goggles Fog?
		How Can I Stop Them Fogging?
		My goggle always slip when racing!

Finding a Pair of Goggles

The best goggles are the ones that fits comfortably without leaking. Everyone has a different shaped face, and what works for one person isn't necessarily going to work for another. You need to find a pair that will suit the shape of your face.

A quick test - take the goggles out of the packet. Lean over, so your face is facing down towards the floor. Press the eye cups into your eye sockets and let go - they should stay in place if they are a good fit. You can make adjustments to the spread of the eyepiece, but if the goggles don't hold without the strap, at least for a few seconds, they probably will need a very tight strap to keep the water pout. Don't be tempted to compensate for a bad fitting pair of goggles by tightening up the head strap. Although this may be necessary for racing, it is really no fun having sore eye sockets after a swim, so you want a pair that are watertight with only a low tension in the strap.

It is always a good idea to try before you buy - find someone at swimming who has a different pair to you and try them out, it will give you the best idea as to whether they will suit you even if the adjustment isn't perfect.

Care for your Goggles

Caring for your goggles can be a drag, especially to keep them in as-new condition, but it can be worth it. Our top tips:

		After swimming give them a rinse in clean water (e.g. in the shower), the chlorine in the pool can eat away at the seals
		Between swimming sessions, make sure you let your goggles dry out and store goggles in a dry place, not in the bottom of your bag. This is particularly true of those with foam seals, which can breed all sorts of mould and bacteria.
		It can be worth investing in a pouch or using the original box to store your goggles in to protect them - scratched goggles are as hard to see through as fogged up goggles

Fogging

Fogged up goggles have to be one of the most annoying things in swimming; not being able to see where you are going let alone the coach, pace clock etc. can drive you mad! Its a perennial problem though and happens to everyone, but why and, more importantly, what can we do about it?

Why Do Goggles Fog?

Basically, because the air inside your goggles is moist (it picks up water vapour both from the atmosphere in the pool when you put your goggles on and from the surface of your eyes) and the fact that the this air is kept warmer than the water outside. The temperature of your goggle lens drops due to the cooling effect of the water and at a certain temperature (known as the dewpoint temperature) is reached, the water vapour in the air inside the goggles condenses into plain old water on the surface of the lens, giving condensation, just like you get on the inside of a car windscreen. this layer of condensation is what causes your view to be obstructed.

How Can I Stop Them Fogging?

A few things can help to prevent this from happening, only a couple of which are really practical. For example you could regulate the moisture content or temperature of the air inside your goggles to prevent the dewpoint ever being reached, but this would be very impractical.

The two most successful solutions are as follows:

1. Allow a small amount of water into your goggles. The water acts as a windscreen wiper as you turn your head, washing away the fog. If you have the right amount of water, it will sit far enough away from your eyes and wont irritate them. This obviously won't work for all strokes (back stroke particularly!)
2. You could use some sort of surfactant on the lenses to prevent condensation from forming, which is the best and most widely used solution. Many swimmers swear by either spitting in or licking their goggles which provides a coating to the lens (although personal experience leads me to believe that this won't work for everyone). The man made alternative is Anti-fog solution which provide this coating nicely, at a price

Generally, whichever solution you adopt it is wise to keep the inside of you goggles clean, as any dirt, particularly in the corners, will act as the starting point for condensation, and mean it will be more easily created. Dirt will also exacerbate the problem, by making it harder to see where you're going to start with.

My goggle always slip when racing - is there anything I can do to stop this?

It can be wise to slightly tighten your goggle strap for racing, but you shouldn't rely exclusively on this to keep your goggles on your head, you need to have a well fitting pair to begin with. If you do tighten it up, make sure that it doesn't cause the nosepiece to slip and become longer - this will just make the problem worse. If you have a well fitting pair, properly adjusted and they still come off, there are a couple of other things to try. If the strap slips and the goggles end up around your neck, or even worse in your mouth, try wearing them underneath your swimming hat, this will help keep the strap in place. If the lenses flip off or slip and fill with water, you perhaps should look at your diving technique, talk to your coach.