What type of swim gear or floaties should I use for my 15 month old in the swimming pool? Thoughts?

Arm floaties? Is 15 months too young for that? I have a feeling he would just slip them off!

Vest? This is what he uses in his swim class. He has the freedom to go on a baby water slide or dive (well, slight jump really) off the ledge.

Canopy? They one the baby sits in the middle? Seems like my baby wouldn’t be able to move much but at least he I won’t have to hold him constantly. But he can’t really do the slide or jump.