I don't know the "official" safety grade on those tube trainers, but we tried one when our daughter was a toddler and we didn't think it was safe at all. We bought it because it was inexpensive and seemed very practical and convenient (flotation device & bathing suit in one -- great!). However, once we got her in it, and then placed her in the water, the tube in the center of her body (inside her bathing suit) seemed to push her face down into the water. We had to keep holding her up, and found the suit/device very inconvenient (and dangerous) in use! Floaties on the arms didn't do such a great job either, so we opted instead for a mini "boat", which was a large inflatable ring with attached base and seat (child sits in boat with legs hanging down into water -- see sample link below). It also had a nice shade-roof (keeping hot sun off her head and face). She loved that little boat, and while we did stay with her while she was in it, we didn't have to hold it the entire time to keep her face out of the water like we did with the tube trainer.