Robust and practical quick dry neoprene and good looking. Hard to find enclosed toe sandals for boys once they get a bit older but my ten year old really does prefer them so these fit the bill. Only downside is the textured inner sole which he is not so sure about the feel of underfoot - his Merrell equivalents last year had a smooth sole - when he wears them, as he mostly does barefoot (i.e. sockless) to keep cool.
Would also have preferred a bit more colour choice.