Anyone have pool safety floaty suggestions? We just got a membership at our neighborhood pool, so…

Anyone have pool safety floaty suggestions?

We just got a membership at our neighborhood pool, so I'll be taking the boys over there by myself some days. I want a good floaty for my nearly 7 year old. Preferably something not too terribly bulky, that he can move freely in, but where I don't have to worry about him drowning since I will have my 11 month old there too. Terrified that I'll rush to save him, and then baby will end up needing to be saved too 😵