Next, think about the gasket (the seal around the lens), as this will affect both resistance in the water and comfort levels. ‘An inner-eye fit will be more streamlined but an outer-eye fit will be more comfortable, so it depends what your priority is,’ says Marshall-Keith. Not only do the best swimming goggles protect your eyes from chlorine and saltwater, optometrist and founder of Sutton Swimwear, James Sutton, points out they also mean you don't have to hold your head above the water, which can be extremely uncomfortable, especially if you’re enjoying a lengthy dip. Super-soft flexible seals offer greater flex vs previous Biofuse goggles for an even softer and more cushioned fit

Our panel confirmed they were able to keep swimming, distraction-free, when the sun came out, and said the anti-fog coating was effective for the most part. A few testers said they started to steam up around the 30-length mark, so we’d recommend using them for shorter, more casual swims. Clear: Clear lenses let in the maximum amount of light and provide good clarity for indoor swimming, especially in low light. While these are great for swimming indoors, they are suitable for outdoor use too – just note that they won’t reduce brightness or glare. Adjustability is also a key consideration. You could go for a fixed nose bridge, which will feel more flexible against your face, or opt for a pair with an adjustable nose bridge for a more personalised fit. Prescription: These work like prescription glasses, so you can enjoy the same vision you have when wearing your glasses during swimming.The adjustable strap took a little getting used to (the instructions weren’t the clearest) but once the goggles were on, the fit was snug and on point. The suction was watertight, preventing any water from slipping into their eyes, yet they remained comfortable thanks to the smooth silicone. Firstly, consider where you’re going to swim, advises Bridget Marshall-Keith, hard goods category manager at Speedo. ‘If you’re swimming outdoors then you may want a pair with tinted, mirrored or polarised lenses to reduce glare, and built-in UV protection to protect your eyes from the sun,' she explains. Both of those goggles are designed for ultra-competitive swimmers and are more expensive than the previous three options. However, with the higher price tag comes an even broader panoramic view and exceptional hydrodynamics. Budget Depending on how frequently you swim, budget appropriately to be able to buy new goggles between every three months to a year. Product Recommendations

Our winners were easy to adjust and felt comfy all swim long, with no digging in reported. They stayed in place, no matter the stroke or speed, there was minimal fogging, and they prevented any pesky leaks.Adjustable head straps and anti-fog features (to stop your goggles from steaming up mid-swim) are also preferable. How do I know if my goggles fit? If you’re an open water swimmer, you may want to consider goggles with a wider lens so you can see what’s around you. For those exclusively swimming indoors, you can choose a clearer, lighter lens.’ Types of lenses