I used these a few times in rivers and at the sea. There are some minor stains, but how about them for a child during their growth spurt? The soles are not particularly worn down and I believe they are fine for use. I plan to ship them via Nekoposu. Water shoes, marine shoes Rubber sole design for slip resistance. - Color: Light blue - Size: Approximately 21cm - Sole: Rubber sole - Uses: Diving, snorkeling, river play, beachcombing, walking by the water, etc. Thank you for looking.