Took forever to get to me and upon arrival product was damaged. They are darling! Not much to say. There isn’t anything abrasive about them. 5 in US sized shoes, 43 in Ecco’s. I dont have any examples of this because I dont have any that fit the bill in my headphone arsenal. So if you commute along very dark paths, this light probably wouldnt work well as it only provides illumination about 10-15 feet in front (and both sides! They fit perfectly, he said they were really comfortable, and loved the looks. A micro sd to usb adapter is included in the box too for charging your other devices. Be safe!