The picture and listing shows a side vent and a curved top vent - I needed both, but only the curved vent was shipped - I understand that the number shown was for the curved vent only - the picture on the listing needs to be changed to show only whats shipped They arent as lightweight as a good running shoe, but they are still lighter weight than a comparable "fashion" sneaker. Another aspect of comfort is ear pressure. Before after picture attached (one on right was changed after the photo ;) )Would highly recommend ! 2 duffle bags. I bought these for my zoom classes as I didnt want to use my headphones, and although cheap, do an excellent job. Update* the right earbud now only holds a 10 minute charge before warning low battery then shutting off in a minute. So, I ordered this case. There were other shoes that I ordered in medium width that others had given feedback were too narrow. The sole is comfortable.