I used these shoes 60 hours a week for 5 months and they are still extremely comfortable. I find that these are very light and comfortable although I did have to do some tip rolling to get it right for my larger sized ear holes. Nunca llega al 100% de carga según el indicador, se queda al 93% aun cuando lo dejes casi 8 horas. Its only been a few days but OMG theyre amazing! I am returning these items as I cant do a thing with them. I do not slip or trip in these. Theyre great for use around power equipment like chainsaws, weedeaters, mowers and the like on hot summer days when you dont necessarily want hot headphone style hearing protection. The electrician who came to fix other damage caused by the lightning said these power strip surge protectors are useless. However, occasionally the left earbud will drop out for a fraction of a second. after reviewing loads of reviews including more expensive headphones.