I heard good things about Koss and was excited to try a new line of earclip headphones for my workouts. I immediately heard a difference in sound quality compared to my old Philips in the same price range, but alas, the construction is rather shoddy. Specifically, the ear clips were way too loose to start, and when I attempted to adjust them, the hooks fell off and have been popping off ever since.I'd love to keep them if they were only more sturdy but they completely fail their purpose as is. As far as I can tell from the specs, the next bump up in the Koss line has only this difference but doubles in price for what should be a very simple and basic feature. I've had these earphones for less than 30 days and the manufacturer still wanted my return to count for less than its purchase value toward an upgrade. Can't think of anything to add but to shake my head. Could have been a great product but it's back to searching.