Splash About, a British swimwear brand Swim Nappy, size M (3-8 months) These are swim pants with diaper functionality. Used about twice. - Some sports clubs offer baby swimming lessons starting from 4 months old. How about it for your swimming debut? - These pants have diaper functionality, so they fit snugly and there's no need to worry about leaks. - If you're going to baby swimming, these are more economical and eco-friendly than buying swim diapers. Also, the fabric is very durable, so I feel it's a material that won't easily chill the stomach, even in the coming cold season. Please purchase if you understand that this is a used item.