The Birkenstock Kids Rio EVA Black Narrow Fit sandals in size US 3, Eur 34, and 22cm UK are designed for unisex kids. These strappy sandals feature a comfortable EVA material in a classic black color. The Birkenstock brand ensures quality and support for active kids, making them a great choice for everyday wear or water activities. With a narrow fit, these sandals provide a snug and secure feel for children on the go.