The strap slips. My daughter has to pull them tight every lap or two.
I bought these for my five year old and they are okay for practice for a smaller child, but for a really active swimmer who needs excellent suction it would not be my first choice. The strap is not a good fit.
The side straps do not fasten very well and they keep coming off
The strap had to be replaced before my son could use these. They wouldn't stay adjusted. I thought I was doing something wrong but his coach said the strap stinks and to replace it with a bungee and now it works great!
These look cooler than they feel when you wear them. I have a larger nose and none of the settings are big enough. I suggest buying goggls with seperate sized nose peices and a not so flashy design. I have not even went in the water with these because I don't find them to fit my face well at all. I recommend the ClubSwim Antifog Pro Mirrored Goggles.