The fins are therefore ideal for children because they do not have fixed shoe size and can be fixed in accordance with the heel strap of the foot size. Operation is simply extending the belt a little effort - but that probably prevented that loosen the fins slightly. The blade is not too long - is less stressful for kids. Everyone could choose its own color, so there is no confusion. The foot space is not too tight resulting in cramps in the feet more often with me in fins with a fixed shoe, which was next to the "grow" with prospective buyers.
This product can only recommend - in my opinion, in any case better than fins with a fixed shoe!
A star deduction because the fins not swim. Especially for children, but that would be desirable.