I used it for going on bike rides; for this use, the form factor is perfect (there is no sound insulation, so you will be able to hear oncoming traffic, signs, and other things), and in my opinion, for sports it is typically superior to "vacuum" ones. The sound is not ideal, but it is not offensive either, and it is satisfactory for the price (these are inexpensive headphones). I got it mostly for listening to audiobooks and podcasts, and it works great for those things (and for a YouTuber as well), while it is adequate for casual music listening (though I won't use it as my primary set of headphones for listening to music). The quality of the music is sufficient for usage during athletic activities because, even without using noise isolation, it is possible to hear the wind and other ambient sounds, even when the volume is turned down to its lowest setting. The use of electronics in them results in a superior sound. The headphones do not have a "mumbling" quality, but they do have a grainy sound, and the bass is not overpowering (it is gentle and does not load up).
Canon Nikon Sony Panasonic FujiFilm Olympus Pentax DSLR Camera Bag, Evecase Large Vintage Canvas Messenger SLR Shoulder Strap Case - Gray
45 Review
A Durable And Protective CaseSack For Bose QuietComfort And SoundLink Headphones
41 Review
Protect Your Earbuds On-The-Go With Small And Portable EVA Case - Perfect For Airpods, USB Drives, Cables And More!
34 Review
Classic Camera Bag, Evecase Large Canvas Messenger SLR/DSLR Shoulder Case With Leather Trim, Tablet Compartment And Removable Insert For Mirrorless, Micro 4/3, Compact System, High Zoom Digital Camera
41 Review