His last few pairs of shoes he has purchased were Hoka Gavioto tennis shoes. Just make sure all the pieces snap in place. I was amazed the first time i used these ones. Secondly, the instructions refer to the 2 Upper Bars as "Part A" - so I assumed that they were identical. Build QualityBoth headphones are built with a lot of thought to durability and design for the end user. Omg ! These DT1990s have this fantastic ability to pull apart each track into the individual instruments, especially in rock music. I would only recommend these earphones if you are only willing to spend about $10. I previously had a Cliffs sandal I purchased from a storefront retailer that I loved because it looked good on my feet and was comfortable. I asked for a replacement of the Fly 9, and I just happened to mention in my message that my next purchase would be a Fly 10, which is their most recent model of the same headphones.