We have our daughter (4 years, 19 kg) bought the vest, so that it is protected on a boat trip and a holiday by the pool at any time before the fast drowning. To the south in the summer, it is however a bit too hot so. But in unserern Schwimmbdern our whirlwind wonderfully stylish vest. She even jumps forward roll from the one-meter board without drowning. Of course you are not let the children denoch unbeaufscihtigt.