Finding that perfect pair can take some trial and error, though.

Here are the things youll want to know when you start your search.

Color:Tinted and mirrored goggles both help to shade your eyes if you swim in bright sunlight.

Lifehacker Image

If you stick to indoor pools, though, color doesnt matter.

Straps:Goggles with a single strap can end up sliding down toward your neck.

The left-most goggles in the photo above are a mask style.

The smaller types are more likely to stay in place, but bigger ones are usually more comfortable.

Prescription:If you wear glasses, you might order goggles in your glasses prescription.

This limits your choice of models, but you still havemultiple optionsfrom brands likeSpeedo,Sporti, andTYR.

These considerations should give you some ideas for which brands and models of goggles will work for you.

The real test, though, is whether your chosen goggle actually fits.

you could check the fit of a pair of goggles without putting your face in the water.

Stick the goggles to your face, without putting the strap on your head, and press hard.

The GIF above shows you how, orcheck out the full videofor more.

If the goggles stay on your face for a few seconds, you know you have a good fit.

Next, you better decide how they feel.

Anything thats uncomfortable in the store will feel even worse by the end of a long workout.

Swimmers who prefer tiny, tight goggles for racing often use a more comfortable pair for their everyday swims.

While youre experimenting with fit, dont be afraid to look beyond the label.

It turned out I just needed a smaller size.

If you order online, consider the stores return policy.

With a little trial and error, you should be able to find the perfect pair.

Illustration by Sam Woolley.