I?ve tried two other Bluetooth sleep masks that are available on amazon, both were good but this one solved a couple of big problems. Buying headphones is difficult whether we want one good pair or whether we collect them. Thats my bad. I have not used it beyond that first test. I am usually a large size 7. I went with the size that was too long because the Nero was just hugging my feet too much. But I have plenty of shoes in a normal width 10 that I wear with no problem, so I got these in a size 10 as I can wear normal crocs in that size with no problem. For all those complaining about they didnt come with bolts to attach to the bike, you are supposed to use the bolts that hold the rear wheel to the bike. Every single time Id buy a new set of earbuds, they would fall out of my ears at some point SO easily, or cause so much pain. Unfortunately, will not hold larger base wine bottles except on top two open notches.