Here's what I found a while back when seeking info about tumor necrosis. 1) Necrosis in the tumor means that the cancer cells in that area are dead. The pathologic finding of necrosis suggests a fast-growing cancer. This often happens because the tumor runs out of blood supply in the central portion. Without a blood supply, the tumor cells cannot live.
In association football, where the shoes themselves are known as football boots, there are three different cleat types. There are soft ground cleats which are made for wet weather. The soft ground cleats are always replaceable, and are almost always metal, so when they wear down they are easy to replace.
The adidas Performance Men's Turf Hog LX Mid Football Cleat is an excellent set of cleats. I am using them for soccer referee duties; the mid-cleat gives excellent added stability to the ankle for lateral movement, and provides a good, snug fit on both the ankle and the foot.