We tried this suit for the first time on our 6 month old yesterday. It fits well and seems to block the sun, but it was so hot in the Texas almost summer. It might be ok if she is actively in the water all the time, but it was too hot for getting wet occasionally but hanging out with mom and dad on the boat the rest of the time. I'm kind of disappointed because it was pretty expensive for baby gear. What am I going to do with it now?