Couldn?t look up or the headphones would slide off the side of my head into my ears which was annoying and uncomfortable. I appreciate the adjustable strap, too, as my foot isnt fat/wide all over, just wide at the toebox area. An 11 would definitely have been to small. The storage boxes are easy to assemble and feel quite solid and the magnetic closing feature on the door is a nice touch. I bought this thinking I would receive the Classic Rack, but got the MTB rack instead. Interestingly, it works on my Windows machine. Which is a bit odd for a go anywhere boot. The ear odd are essentially the OEM ones - same material and same snap-in install. It has a handy pocket for peripherals. Birkenstock sempre di qualità ??