I bought these shoes Zwilliinge and a year ago already. You are awesome:-). Easy to put on, ingenious seat with elastic inside and Velcro and the best is the sole. It is absolutely non-slip. We used the shoes mostly in the outdoor pool, both on the plates outside the pool, as well as in the pool itself. Recommended! Unfortunately, I have to rely on the latest ratings, the sizes now adapted his, so the old reviews concerning. The variables are no longer correct. Last year, we had already taken two sizes smaller and the shoes fit perfectly. This year I ordered our actual sizes, but unfortunately they are too big. One of my sons has size 24/25 normal and it fit the Aquashoes 22/23 and he still has a finger width space. So it is with his brother, who has smaller feet. Two numbers less fit with us in any case.