I am a fitness swimmer…1 mile or so 3 days/week. Gift from my daughter Allyson my name is Karen…over 65. I found them to leak unless I made them very tight. After 2 weeks (yesterday) I changed the nose piece to a smaller one and the goggles were fine. I had a lot of trouble getting the nose piece in the slot though. I will be swimming again tomorrow and hopefully they will be not leak. 1. Improve directions for changing nose piece 2. Better labeling of nose piece, not sure which one mine came with in comparison to the ones with the plus and minus symbols next to them 3. Improve gift giving option 4. I sent a few emails requesting assistance and did not receive responses