I was amazed. 2 months in and the right earphone no longer charges when its put back into its dock. I usually wear a size US 8, but a size 7 in this fits good - I do need to add moleskin under the straps to tighten the fit up, but that is the norm for me with many sandals any brand. Extremely comfortable, I have a desk job though do walk quite a bit throughout the day. Disappointed and pleased at the same time. But after having them in for just a short period they seem to get residue on them from the ear, and start sliding off, or sliding around and blocking some of the sound. Im a "prosumer" audophile. Small increments. (I really like Sennheisers attitude to spares, they even provided me with new earpads for my treasured 1970s reference cans which are still working perfectly ! I like to walk, but my legs get tired quickly.