I love these swim diapers! However, at 7 months old, my daughter was still tiny and the smallest size Huggies makes for these is a size small. The small size was still too big for my daughter and I had to wrap the sides all the way around just to stay on her. However, they still worked, and I only noticed any sort of leakage when we were already out of the pool, and she had pooped and peed and the urine dripped a bit from the legs. At first, I thought it was residual water from the pool, until I wiped it up and the paper towel was yellowish/greenish. Then I changed her out of the swim diaper and she had green poop. But, the poop stayed in, even if some liquid came out. I was in a private pool, not public so I wasn't too concerned. Overall, I like the product, just wish they made a size smaller.