The metal backing of crystals around the ankle strap have different colors. Either way, I was pretty leery of this, but purchased because my closet floor was a hot mess, shoes everywhere, and I needed something pretty wide and not that high. And the next ting you know, the baby is crying. Then the trouble started. I like how sturdy they are and they roll a little better than other products Ive used. Editing previous review. Flat but supportive which is exactly what I needed. Will use for other purpose. The band broke twice in 1 year and there were software bugs sprinkled throughout my time of owning it. com introducing the Plug Bluetooth, and I knew if it sounds as good as the corded version I would be very happy.