Never got this swim diaper to the pool.  At 15 weeks, my baby boy is nearly 16 pounds, and this swim diaper was extremely tight in his waist.  Didn't seem comfortable for him.  We have had a hard time finding pants that fit his waist since he was born...so I'm not really surprised.  I opted for a Bummis swim diaper with a velcro waist that I could adjust.