Start with fit and the kind of day your child has ahead. Newport and Hyperport have KEEN's Original Fit, with more room across the toes. Newport is the more rugged adventure sandal, while Hyperport has extra cushioning. Seacamp is a lighter, flexible hybrid water sandal with a closer Contoured Fit. Moxie is also Contoured Fit, with a quick-cinch bungee and a soft, light feel for everyday water play.

Newport and Hyperport are the better place to start if your child likes more room across the forefoot. Both use KEEN's Original Fit, which gives toes space to splay. Seacamp and Moxie have a Contoured Fit that sits more closely around the foot. Measure both feet while your child is standing, then use the longer centimetre measurement against the KEEN size guide.

Yes. The KEEN water-sandal styles on this page are made for splashing, beach days and water parks, with washable webbing and quick-dry materials. Rinse away salt, sand or chlorine after use when possible, then let the sandals air dry before the next outing.

Remove loose sand and dirt first. Wash KEEN water sandals in cold water on a gentle cycle with a small amount of mild detergent, either on their own or with non-delicate items. Let them air dry completely. Do not put them in a dryer. Styles that are not machine washable, such as UNEEK, should be hand washed with room-temperature water and mild detergent instead.

Newport, Seacamp and Hyperport use bungee lacing with an adjustable hook-and-loop strap, which helps children get a secure fit and makes on-and-off easier. Newport also opens wide at the heel. Moxie has a quick-cinch bungee closure and a closer fit around the foot.

Choose using your child's measured foot length in centimetres, rather than relying only on their usual shoe size. Once the sandal is on, check that there is comfortable room at the toes, the heel is secure and the straps or bungee are not pressing into the foot. A sandal that is very loose will be harder to walk and run in.