Best toddler/kid's USCG approved life jackets

What is the best USCG approved life jacket for kids for pool? I have 3 kids 5 and under. I have my 5 and 3 yr old in swimming lessons. They currently use body glove USCG swim vest, but I've been hearing about how kids shouldn't be in arm floaties. Which one do you recommend? Also this is for times where my kids and i are at family gatherings at a pool and i cant be holding all 3 at once. And yes, I'm always with them while they're in water. Just for reference I've attached the ones they currently use at pool.

Would like to hear which life jacket are best for toddlers/kids! TIA!