Really sad, as I love Puma shoes. There is no dowel type construction holding it together. You can even place the attachment in an olympic plate if you cant use it with your rack. Please give them a few days to break in, they conform to your feet by then, but are quite hard in the beginning. A little big on my face, but I am used to this. They are comfortable, no feet sweating, if its cool out I wear crew socks with long pants and ankle socks with shorts and no socks when it hot. Again, I will update when I start to see signs of wear. There is also a massive issue with lag/latency when using voice chat programs such as Discord. In reality, the two D pieces line up, and the two E pieces line up, but I had to figure it out on my own, without the help of the instructions. If youre dropping this in your carry bag its better for the buds to remain together then splay out and possibly damage.