Theyre definitely a little heavier than they look, even for a safety shoe in my opinion, but I think that also ties back to the sole. ” You have been warned! I have them in my Yunzii KC84 and they are a nice match. I mounted these with screws on the inside of my pantry door. At no time during each run I need to worry about earbuds falling out or push them in repeatedly like my other earbuds. I was so incredibly and pleasantly surprised when I received my order of 4mm beads. 5/7 but based on reviews I ordered an 8. Shifting it into extra bass mode is fairly unnecessary for me, but it definitely pumps up the beat more and can potentially drown out more background sound. Short version: These headphones are great at this pricepoint. Well, we have both checked all over the headphones and the model number isnt there.