My son really likes these goggles, but it did take some effort to get the absolute perfect adjustment. When he would dive off the starting block, water was leaking in. I think this is user error, not a defect of the item. It just requires persistence to get the right fit of the nose piece, plus the right amount of tension on the straps and placement on the head. Overall, these are great goggles and it is the second pair he has gotten because he likes them so much. When the old ones wore out, we salvaged as much of the pieces as possible, and saved those spare parts for repairing any future broken parts to keep the goggles alive as long as possible.