New SwimSchool Swim Trainer Vest

My 1.5 year old is a little fish and loves being in the water. We ordered a puddle jumper for him, which I absolutely love, but my son has started to refuse putting it on. I was looking for something that still offered flotation support, but also a little more arm freedom, which he seemed to be interested in. This vest isn't as thick as a normal life vest, so still offers him a lot of freedom on his stomach and back to easily turn and float, but will also let his face go under water, which i'm all for, as he needs to understand that it's ultimately his body that needs to keep him afloat. I have to deduct some stars because my son is able to unzipper the vest by himself. The kid is too much of a dare devil and would rather just free swim, and unfortunately it's very easy for him to unzip this while in the pool. It's absolutely necessary to always be right next to your child until they are old enough and fully independent, but it's a little more worrisome than the puddle jumper which securely clips in the back and he can't access to remove.