Went through some of my music (320 kbps MP3/FLAC), songs Ive heard literally hundreds of times. They work excellently and Ill definitely purchase again. Doch dies liegt wie so häufig am eigenen Geschmack und den Vorlieben. My 11 year old wanted these so he could listen to music before his wrestling matches. It zips closed securely and has a nice elastic wrist strap that is super convenient for people like me who lose everything! Instead they say “GPOS freestyle” - see pic. He loves them and I can hear him giggle when he wears them and is watching a movie so Im assuming the sound quality is also good. I got these in a 7 1/2 and they are perfect! But I generally am coming in at 10-10. I can make it work with our bikes, but I wouldnt say leave my bikes on the rack overnight in a hotel parking lot.