scholls website and they are WAY WAY better quality than these, the difference is night and day. I played some of my favourite house music initially. The rubber on the back of the F1s appears thicker than the Treks. Hurt my ankle Its the real thing. I like the dragon design on the exterior of the cups, very appealing to kids. These sound similar or better than some of the earbuds that are double or triple the price. However, they do stick out from the ear slightly, but they rest comfortably (in my opinion) on the lower portion of the ear opening. Its workable, having tiered bars is the most important feature for us, but be aware of this. But comfort great, and also water friendly.