Had no idea of swimming goggles and had therefore to rely on other customer reviews. Have you bought my children, maybe for kids too expensive because the not so special care of it. Have always bought cheap for one or two euros for already several. Now I have reasonable buy and keep their promise. Super Glasses, stable, does not start and is even a plastic box to store it. Also fits smaller children (my daughter is 5 years) to adults. Price - performance is really okay.