After 6 weeks of use, only used by our 3 year old at our neighborhood pool, they have a HUGE hole in them.  I can literally stick my finger all the way through the hole.  Again, this is after only 6 weeks of wear.  He only wears them Saturday and Sunday at the pool, so essentially after 10 uses they are done.  My son has never worn them anywhere but the time he was at the pool.