Cross country spikes are more robust than track spikes. They must deal with the elements more and with natural objects, like sticks and rocks. The upper is thicker, therefore, and can be water-proof. They often have more cushioning and heel support because of the stress of downhill running. In addition, they can have longer spikes (anywhere from 1/4 in. to 5/8 in.) for better traction, as they are used on natural terrain that are affected by weather and can include hills.
