Swim goggles, where anti-fog is a coating that wears off and the frame size is the real choice

Swim goggles are a small object with one job, keeping water out of your eyes so you can see, and the titles on this page sell them on a feature that all of them have and most of them lose. Eighteen pairs and one tin of anti-fog are here.

Anti-fog, and why it is on every title

All nineteen titles say anti-fog. Goggles fog because the air inside is warm and wet from your face and the lens is cold from the water, and the water in the air condenses on the plastic in droplets. An anti-fog lens has a coating on the inside that makes the water spread into a flat sheet you can see through instead.

The coating works. It also wears. Chlorine takes it off over weeks, a finger wiped across the lens takes it off in a stroke, and rinsing goggles under a tap and leaving them in the sun finishes the job. After that, they fog like any other goggles, and they are still perfectly good goggles.

The nineteenth title here is the honest answer: a solid anti-fog agent in a tin, rubbed on the inside of the lens before a swim. It is what the coating was, in a form you can put back. Spit and a rinse does the same, less well. Neither is a reason to buy a new pair.

Big frame or small, which is the actual decision

Four titles say big frame and two say small frame. Three more say low-drag or competition, which means small.

A big-frame goggle has a gasket that sits on the bone around the eye and seals against the whole socket. It is comfortable, it does not press, and it gives a wide view, and four titles say wide. It is the right pair for a holiday, a lido, a child, or anyone who swims for pleasure.

A small-frame goggle has a gasket that sits in the socket itself and seals by suction against the soft skin around the eye. It sits closer, moves less when you push off a wall, and after forty minutes it has left two rings on your face that last an hour. It is the right pair for lengths, and the wrong one for a day at the beach.

The shape is on six titles by name, and on a few more if you read low-drag and competition for small and wide view for big. The rest leave it to the photographs.

The names

Six titles carry a maker’s name. COPOZZ and SCVCN are on two each, JSJM and Dezition on one. They are marketplace makers with ranges you can look up, and on a goggle that matters because the strap and the nose bridge are the parts that break, and a maker with a range sells them separately.

A twentieth result carried the name of a major swimwear company, on a cheap listing from a seller I cannot check. On a marketplace a big name on a cheap listing is a question rather than a guarantee, and it was taken off this shelf rather than listed with a shrug.

UV, mirrored, and the words that describe the plastic

UV protection is on nine titles, and one of them says 100 percent. The lens of any goggle here is polycarbonate, and polycarbonate blocks ultraviolet light whether the title says so or not. It is worth having for an outdoor pool or the sea and it does nothing under a roof, and it is not a feature to pay for.

Electroplated or mirrored, on two titles, is a metallic tint on the outside of the lens. It cuts glare and it makes the lens dark, which is good in a sunlit outdoor pool and bad in an indoor one on a winter evening. It also scratches, and a scratched mirror is a smear you look through.

HD and high definition, on seven titles, describe a television. A goggle lens is a curved sheet of clear plastic, and the words mean it is clear, which was the minimum.

Prescription

One title is sold by dioptre, for myopia. If you are short-sighted and swim in a blur, that pair is the one on the page that does something the others cannot, and it costs about what they do. The listing will ask for a strength for each eye; use the sphere number from your glasses, rounded down half a step, because water and a close lens make everything look a little bigger. The pair comes with the anti-fog spray in the box, which is the seller admitting what the coating is.

What none of them says

The nose bridge. No title says whether the bridge between the lenses adjusts or comes in sizes, and on a small-frame goggle that is the whole seal. Two titles say no leaking, which is a promise made to a face the seller has not seen. A big frame is forgiving; a small one is not. Look for a bridge in the photographs, and if you have a narrow or wide face, expect to try two.

What the gasket is. Seven titles say silicone, and silicone is right: it seals, it lasts, and it does not perish in chlorine the way rubber and foam do. The other twelve say nothing, and a foam gasket is the one that goes hard in a season.

A case. None, on nineteen titles. Goggles live in a swim bag with keys and a bottle, and the lens is the first thing to scratch. A hard case is a pound, and it is the accessory to add.

Five titles bundle earplugs, which are silicone plugs unrelated to the goggles and useful if you get water in an ear.

The resistance band guide covers the other cheap piece of kit on this shelf that is sold on a word and chosen by a number.

What I would actually do

For most people, the COPOZZ with the one-piece lens and the big silicone frame. It is comfortable for as long as you swim, it has a maker behind it, and the shape is the one that seals on most faces.

For lengths, the SCVCN low-drag pair. Small frame, competition shape, and a name that sells the strap separately when it goes.

If you wear glasses, the prescription pair. It is the one product on this page that changes what you see.

For the goggles you already own, the anti-fog agent. It is a tin of what the other eighteen titles are promising, and it is the reason not to replace a pair that has started to fog.

Whichever you buy, rinse in cold water, never touch the inside of the lens, and let them dry in the dark.