These baby sandals are made of breathable mesh material for comfortable wear. They're safe for water play and are very useful. How about them for the coming season?? They were worn indoors for six months and outdoors for one season. They were worn by a child who wears a Japanese size 15cm. The crack-like marks on the sole mentioned in the comments were originally there, and are like a rubber distortion. - Brand: Nike - Color: Black - Size: 7C (US) Thank you for looking.